Final (Modules 7-16) Flashcards
Which message is sent by a DHCPv4 client to initiate the lease obtaining process?
DHCPDiscover
Which two DHCPV four messages are sent by the server in the lease obtaining process? Choose two.
DHCPOFFER
DHCPACK
Which two DHCPv4 messages are used in the lease renewal process? (Choose two.)
DHCPREQUEST
DHCPACK
A DHCP enabled client PC has just booted. During which two steps will the client PC use broadcast messages when communicating with a DHCP server. (Choose two.)
DHCPREQUEST
DHCPDISCOVER
And administrator issues the commands:
Router (config) #InterfaceG0/1
Router (config -if) #IPAddress DHCP
What is the administrator trying to achieve?
Configuring the router to obtain IP parameters from a DHCPv4 server.
When a client is requesting an initial address lease from a DHCP server, why is the DHCPREQUEST message sent as a broadcast?
The client may have received offers from multiple servers, and the broadcast serves to implicitly decline those other offers.
Which DHCP IPV4 message contains the following information?
Destination address: 255.255.255.255
Client IPv4 address: 0.0.0.0
Default gateway address: 0.0.0.0
Subnet mask: 0.0.0.0
DHCPDISCOVER
What kind of message is sent by a DHCPv4 client requesting an IP address?
DHCPDISCOVER broadcast message
As a DHCPv4 client lease is about to expire, what is the message that the client sends the DHCP server?
DHCPREQUEST
What is the destination IP address when an IP V4 host send a DHCPDISCOVER message?
255.255.255.255
If more than one DHCP server is available on the local network, in which order will DHCP messages be sent between a host and a DHCP server?
Discover, offer, request, acknowledgment
What is the most likely scenario in which the WAN interface of a router would be configured as a DHCP client to be assigned a dynamic IP address from an ISP?
It is the SOHO or home broadband router.
Which is a DHCPv4 address allocation method that assigns IPv4 addresses for a limited lease period?
Dynamic allocation
What is the reason why the DHCPREQUEST message is sent as a broadcast during the DHCPv4 process?
To notify other DHCP servers on the subnet at the IP address was leased.
How is a DHCPDISCOVER transmitted on a network to reach a DHCP server?
A DHCPDISCOVER message is sent with the broadcast IP address as the destination address.
Which destination IPv4 address does a DHCPv4 client used to send the initial DHCP discover packet when the client is looking for a DHCP server?
255.255.255.255
Under which two circumstances would a router usually be configured as a DHCP V4 client? (Choose two.)
This is an ISP requirement.
The router is intended to be used as a SOHO gateway.
Which address does a DHCPv4 server target when sending a DHCPOFFER message to a client that makes an address request?
Client hardware address
Which address type is automatically created by default on a host interface when no RAs are received?
Link local address
Which method best describes stateless DHCP?
SLAAC with stateless DHCPv6 server
Which two ICMPv6 messages are used in the SLAAC process? (Choose two.)
Router solicitation (RS) Router advertisements (RA)
Which command must be configured on a router to enable it to join the IPv6 all routers multicast address FF02::2?
IPv6 unicast routing
What are the flags settings when a host should use the SLAAC only option?
A=1, M=0, O=0
Which ICMPv6 message is sent by a host in an attempt to locate an online IPv6 enabled router to obtain IPv6 addressing information?
Router solicitation (RS)
What method is used by a host to verify an IPv6 address is unique on the local network before assigning the address to an interface?
DAD
What destination UDP port do DHCPv6 clients use to send DHCPv6 messages?
546
What DHCPv6 message does a host send to look for a DHCPv6 server?
SOLICIT
What DHCPv6 message does a host send the DHCPv6 server if it is using stateful DHCPv6?
REQUEST
What flag settings combination is used for stateless DHCP?
A=1, M=0, O=0
What flag setting indicates that stateful DHCPv6 is used?
M=1
Which three DHCPv6 rules can a router perform? (Choose old that apply.)
DHCPv6 client
DHCPv6 relay agent
DHCPv6 server
Which command is not configured in stateless DHCPv6?
Address prefix IPv6-address/prefix
An IPv6 enabled router is to acquire it’s IPv6 GUA from another IPv6 router using SLAAC. Which interface configuration command should be configured on the client router?
IPv6 address autoconfig
A router is to provide DHCPv6 server services. Which command should be configured on the client facing interface?
IPV6 DHCP server pool–name
An IPv6 enabled router is to acquire it IPv6 GUA from a DHCPv6 server. Which interface configuration command should be configured on client router?
IPv6 address DHCP
Which DHCPv6 verification command will display the link local and GUA assigned address for each active client?
Show IPv6 DHCP binding
Which command is configured on the client LAN interface of the DHCPv6 relay agent?
IPv6 DHCP relay destination
How does an IPv6 client ensure that it has a unique address after it configures IPv6 address using the SLAAC allocation method?
It sends an ICMPv6 neighbor solicitation message with the IPv6 address as the target IPv6 address.
Which method would an IPv6 enabled host using SLAAC employ to learn the address of the default gateway?
Router advertisements that are received from the link router
What two methods can be used to generate an interface ID by an IPv6 host that is using SLAAC? (Choose two.)
Random generation
EUI-64
A client is using SLAAC to obtain an IPV6 address for its interface. After an address has been generated and applied to the interface, what must the client do before it can begin to use this IPv6 address?
It must send an ICMPv6 neighbor solicitation message to ensure that the address is not already in use on the network.
Which command should be configured a router interface to set the router is a stateful DHCPv6 client?
IPv6 address DHCP
What message informs IPv6 enabled interfaces to use stateful DHCPv6 for obtaining an IPv6 address?
The ICMPv6 router advertisement
Which destination IP address is used when an IPv6 host sends a DHCPv6 SOLICIT message to locate a DHCPv6 server?
FF02::2
In which alternative to DHCPv6 does a router dynamically provide IPv6 configuration information to host?
SLAAC
A company implements the stateless DHCPv6 method for configuring IPv6 addresses on employee workstations. After a workstation receives messages from multiple DHCPv6 servers to indicate their availability for DHCPv6 service, which message does it send to a server for configuration information?
DHCPV6 INFORMATION-REQUEST
What process is used in ICMPv6 for the host to verify that an IPv6 address is unique before configuring it on an interface?
DAD
What are two characteristics of the SLAAC method for IPv6 address configuration? (Choose two.)
The default Gateway of an IPV6 client on a LAN will be the link local address of the router interface attached to the LAN.
IPv6 addressing is dynamically assigned to clients through the use of ICPMPv6.
After booting, a client receives an ICMPv6 RA message with the M flag set to zero and the O flag set to one. What does this indicate?
The client should automatically configure an IPv6 address and then contact a DHCPv6 server for more information.
Network administrator is entering the command IPv6 unicast-routing to start configuring DHCPv6 operation on a router. Which statement describes the function of this command?
It is required for sending a ICMPv6 RA messages.
What type of device routes traffic destined to network segments beyond the source network segment for which the sending node may not have an explicit routing information?
Default gateway
What device presents the illusion of a single router to host on a LEN segment but actually represent a set of routers working together?
Virtual router
What device is part of a virtual router group assigned the role of an alternate default gateway?
Standby router
What device that is part of a virtual router group assigned to the rule of default Gateway
Forwarding router
Which FHRPs are Cisco proprietary?
HSRP
HSRP for IPv6
What is the default HSRP priority?
100
True or false? If a router with a higher HSRP priority joins the network, it will take over the active router roll from an existing active router which has a lower priority.
False
During which HSRP state does an interface begin sending periodic hello messages?
speak
Which is a characteristic of the HSRP learn state?
The router has not determined the virtual IP address.
What is the purpose of HSRP?
It provides a continuous network connection when a router fails.
Which nonproprietary protocol provides router redundancy for a group of routers which support IPv4 LANs?
VRRPv2
A network administrator is analyzing first hop a router redundancy protocols. What is a characteristic of VRRPv3?
It supports IPv6 an IPv4 for addressing.
What is a potential disadvantage when implementing HSRP as compared to GLBP?
HSRP does not provide load balancing with multiple active routers.
In network engineer is configuring a LAN with a redundant first half to make better use of the available networks resources. Which protocol should the engineer employment?
GLBP
When first top redundancy protocols are used, which two items will be shared by a set of routers that are presenting the illusion of a single router?
IP address
MAC address
In FHRP terminology, what represents a set of routers that present the illusion of a single router to hosts?
Virtual router
User needs to add redundancy to the routers in a company what are the three options the user can use? (choose three.)
VRRP
GLBP
HSRP
Which two protocols provide Gateway redundancy at layer three (choose two.)
HSRP
VRRP
A network administrator is overseeing the implementation of first hop redundancy protocols. Which two protocols are Cisco proprietary? (Choose two.)
HSRP
GLBP
Which statement describes a characteristic of a GLBP?
It provides automatic rerouting if any router in the group fails.
A network administrator is analyzing the features that are supported by different first top router redundancy protocols. Which statement is a feature that is associated with GLBP?
GOBP allows load balancing between routers.
Which devices are specifically designed for network security? (Choose three)
VPN enabled router
NGFW
NAC
In an 802.1X implementation, which device is responsible for relaying responses?
Authenticator
Which of the following mitigation techniques are used to protect layer three through layer seven of the OSI model? (Choose three.)
VPN, firewalls, IPS devices
Which of the following mitigation techniques prevents many types of attacks including MAC address table overflow and DHCP starvation attacks?
Port security
Which of the following mitigation techniques prevents Mac and IP address spoofing?
IPSG
Which of the following mitigation techniques prevents ARP spoofing and ARP poisoning attacks?
DAI
Which of the following mitigation techniques prevents DHCP starvation in DHCP spoofing attacks?
DHCP snooping
What mitigation technique must be implemented to prevent MAC address overflow attacks?
Port security
A threat actor send the message that causes all other devices to believe the MAC address of the threat actors device is the default gateway what type of attack is this?
ARP spoofing
Which service is enabled on a Cisco router by default that can reveal significant information about the router and potentially make it more vulnerable to attack?
CDP
Why is authentication with AAA preferred over a local database method?
It provides a fallback authentication method if the administrator forgets the username or password.
Which Cisco solution helps prevent Mac and IP address spoofing attacks?
IP source guard
Which two features on a Cisco catalyst switch can be used to mitigate DHCP starvation and DHCP spoofing attacks? (Choose two.)
DHCP snooping
Port security
Which procedure is recommended to mitigate the chances of ARP spoofing?
Enable DHCP snooping on selected VLANs.
What are two types of switch ports that are used on Cisco switches as part of the defense against DHCP spoofing attacks? (Choose two.)
Trusted DHCP port
Untrusted port
Which to commands can be used to enable portfast on a switch? (Choose two.)
S1(config) #Spanning–Tree PortFast Default
S1(config if)# Spanning-tree PortFast
An administrator who is troubleshooting connectivity issues on a switch notices that a switchport configured for Port security is in an err disabled state after verifying the cause of the violation, how should the administrator reenable the port without disrupting network operation?
Issue the shutdown command followed by the no shutdown command on the interface.
A network administrator is configuring DHCP snooping on a switch which configuration command should be used first?
IP DHCP snooping
A network administrator is configuring DAI on a switch with the command ip arp inspection validate DST – MAC. What is the purpose of this configuration command?
To check the destination Mac address in the ethernet header against the target Mac address in the ARP body.
Where are dynamically learned Mac addresses stored when sticky learning is enabled with the switch port port security MAC address sticky command?
RAM
Which of the following wireless networks typically uses lower powered transmitters for short ranges
WPAN
Which of the following wireless networks are specified in the IEEE 802.11 standards for the 2.4 GHz and 5 GHz radio frequencies?
WLAN
Which of the following is an IEEE 802.15 WPAN standard that uses a device pairing process to communicate
Bluetooth
Which 802.11 standards exclusively use the 5 GHz radio frequency? (Choose two)
- 11a
802. 11ac
Which standards organization is responsible for allocating radio frequencies?
ITU-R
True or false: laptops that do not have an integrated wireless NIC can only be attached to the network through a wired connection.
False
True or false: when you need to expand the coverage of a small Network the best solution is to use a range extender.
False
Which wireless topology mode is used by two devices to connect in a peer to peer network?
Ad hoc 
True or false: and EFS is created when two or more BSSs need to be joined to support roaming clients.
True
How many address fields are in the 802.11 wireless frame?
4
What is the term for an AP that openly advertises it’s Services periodically
Passive
What is the term for an AP that does not send a beacon, but waits for clients to send probes?
Active
What IP versions does CAPWAP support?
IPv4 by default, but can configure IPv6
What UDP port and IP protocols are used by CAPWAP for IPv4? (Choose three.)
17
5246
5247
What UDP ports and IP protocols are used by CAPWAP for IPV6? (Choose three.)
136
5246
5247
In the split MAC architecture for CAPWAP, which of the following are the responsibility of the AP? (Choose four.)
Packet acknowledgments and re-transmissions
Beacons and probe responses
Mac layer data encryption in decryption
Frame queuing and packet prioritization
In the split architecture for CAPWAP, which of the following are the responsibility of the WLC? (Choose four.)
Authentication
Association and reassociation of roaming clients
Termination of 802.11 traffic on a wired interface
Frame translation to other protocols
True or false: DTLS is enabled by default under control and data CAPWAP tunnels
False
Which of the following statements are true about modes of operation for a flex connect AP? Choose two.
In standalone mode, the WLC is unreachable and the AP switches local traffic in performs client authentication locally.
In connect mode, the WLC is reachable and performs all its CAPWAP functions.
Which of the following modulation techniques rabbit lease which is a signal among frequency channels?
FHSS
Which of the following modulation technique spread to signal over the larger frequency band?
DSSS
Which of the following modulation techniques is used in the new 802.11ax standard?
OFDMA
How many channels are available for the 2.4 GHz band in Europe?
13
How many channels are available for the 5 GHz band?
24
Which of the following is most likely not the source of a wireless DOS attack?
Rogue AP
True or false: a rogue AP is misconfigured AP connected to the network and a possible source of DOS attacks.
False
What type of attack is an evil twin AP attack?
MITM
What are the best ways to secure WLANs?
Authentication
Encryption
Which of the following authentication method does not use the password shared between the wireless client in the AP?
Open
Which encryption method is used by the original 802.11 specifications?
RC4
Which of the following encryption methods uses CCMP to recognize if the encrypted and non-encrypted bits have been altered?
AES
Which of the following authentication methods as the user enter a pre-shared password? Choose two.
WPA personal
WPA2 personal
In the context of mobile devices, what does the term tethering involved?
Connecting a mobile device to another mobile device or computer to share a network connection.
Which feature of 802. 11N wireless access points allows them to transmit data at faster speeds than previous versions of 802. 11 Wi-Fi standards did?
MIMO
What method of wireless authentication is currently considered to be the strongest?
WPA2
Which parameter is commonly used to identify a wireless network name when a home wireless AP is being configured?
SSID
Which characteristic describes a wireless client operating an active mode?
Must know the SSID to connect to an AP
Which IEEE standard operates at wireless frequencies in both the 5 GHz and 2.4 GHz ranges
- 11N
Which statement describes an autonomous access point?
It is a standalone access point
Which two rules are typically performed by a wireless router that is used in a home or small business? Choose two
Ethernet switch
Access point
Which protocol and important numbers are used by both IPv4 and IPV6 CAPWA tunnels? Choose two.
5246 and 5247
UDP
In three 802.1 1B access points need to be deployed in close proximity which three frequency channels should be used? Choose three
1
6
11
Which type of telecommunication technology is used to provide Internet access to vessels at sea?
Satellite
Which wireless network topology is being configured buy a technician who is installing a keyboard and mouse and headphones each of which uses Bluetooth?
Ad hoc mode
Which type of wireless apologies created when two or more basic service sets are interconnected by ethernet
ESS (extended service set)
What Wi-Fi management frame is regularly broadcast by APs to announce their presence?
Beacon
A user is configuring a wireless access point and wants to prevent any neighbors from discovering the Network what action does the user need to take?
Disable SSID broadcast
When a wireless network is in a small office is being set up, which type of IP addressing is typically used on the network devices?
Private
Are you there is just purchased a generic home router and would like to secure it. What should be done to help secure the wireless home router?
Change the default administrator password
Which protocol could be used by a company to monitor devices such as a wireless LAN controller (WLC)?
SNMP
When configuring a Cisco 3500 series wireless LAN controller (WLC) for a WPA to enterprise WAN, what has to be created on the WLC before creating the new WLAN?
A VLAN for the wireless network
What is a DHCP scope as it relates to a WLAN configured on the WLC controller?
A pool of IP address is for WLAN clients
Why would a technician configure a passphrase for a WLAN on a wireless router?
To configure wireless client authentication
A customer install the wireless access point at home in the closet next to the kitchen the customer mentioned that the wireless communication performance seems degraded when the cordless phone of the microwave oven and the news what is the possible reason for this degradation?
The wireless signal is in the same radio frequency range is the household devices are in.
What functionality is required on routers to provide remote workers with VoIP and video conferencing capabilities?
QOS
A wireless router is displaying the IP address of 192168.0.1 what could this mean?
The wireless router still has the factory default IP address.
A laptop cannot connect to a wireless access point, which two troubleshooting steps should be taken first? Choose two.
Ensure that the wireless SSID is chosen.
Ensure that the wireless NIC is enabled.
In setting up a small office net work, the network administrator decides to assign private IP address is dynamically to workstations and mobile devices. Which feature must be enabled on the company router in order for Office devices to access the Internet?
NAT
What is the difference between autonomous access points that operate in a home environment and controller based access points that operate in a corporate environment?
Controller based access points can be automatically configured and managed by a WLAN controller.
Which WLC tab would eat network administrator typically used to see a summary view of the most heavily used WLANs including the number of clients using a particular WLAN?
Monitor
Users on an IEEE 802. 11N network are complaining of slow speeds. The network administrator checks the AP and verifies it is operating smoothly. What can be done to improve the wireless performance in the network?
Split the wireless traffic between the 802.11 and 2.4 GHz band in the 5 GHz band.
What table does a router used to determine how to forward an IP packet?
Routing table
What action will a router take on a packet with a destination IP address that is on a remote network?
It will forward the packet to the next hop router
Which of the following routes may be found in a rubbing table. choose all that apply
Directly connected networks
Static routes
Dynamic roating protocol routes
Default route
What is used to determine the minimum number of far left bits that must match between the prefix in the route entry and the destination IP address.
Prefix length in the routing table entry
If a router needs to send an ARP request for the destination IPv4 address of the packet, this means the packet will be forwarded:
To the device with the destination IPv4 address of the packet
If a router needs to send an ARP request for the IPv4 address in one of its route entries this means the packet will be forwarded:
To a next hop router
Which packet forwarding method is used by default on Cisco routers
Cisco express forwarding
Which routing table principal is not correct?
Routing information about a path from one network to another also provides routing information about the reverse, or return, path.
Which route entry would be used for a packet with a destination IP address that matches an IP address of one of the router interfaces?
L for local
What type of network is accessed by a single round in the router has only one neighbor?
Stub network
Which two route sources have the ability to automatically discover a new best path when there is a change in the apology? Choose two.
OSPF
EIGRP
True are false? A default route can only be a static route.
False
Network administrator configures aesthetic route for the same destination at work that was learned automatically by the router using OSPF. Which route will be installed and why?
Static route because it has a lower administrative distance.
Which type of routing automatically adapts to topology changes?
Dynamic routing protocols
What type of routing is typically used with a stub network?
Static routes
What metric is used by OSPF to determine the best path?
Cost
What term is used to describe routing over two or more pads to a destination with equal cost metrics?
Equal cost load balancing
Which feature on a Cisco router permit the forwarding of traffic for which there is no specific route?
Gateway of last resort
What are two functions of dynamic routing protocols?
To discover the net work
To maintain routing tables
Which packet forwarding method does a router use to make switching decisions when it is using forwarding information base and an adjaiciency table
Cisco express forwarding
Which type of route would typically be used on a border router so that devices inside the company can access the Internet?
Default
What are two functions of a router?
It determines the best path to send packets
A router connects multiple IP networks
When a router learns that multiple paths are available to a destination Network from the same routing protocol which factor is considered by a router to choose the best path to forward a packet?
The lowest metric
The output of the show IP route command contains the following entry:
S 10.2.0.0 [1/0] via 172.1 6.2.2
What value is indicated by the one in the [1/0] portion of the output?
Administrative distance
Which type of static route creates a Gateway of last resort?
Default static route
What address in prefix link is used when configuring an IPv6 default static route?
::/0
Which two methods can be used to identify the next top in a static route? Choose two.
Next hop IP address
Exit interface
Which IPv4 static route statement is true?
Using the exit interface only is common in point to point configuration.
How is the destinations Netwerk in an IPv6 static route identified?
Using an IPv6 prefix and prefix length
A network administrator configures a router by the command IP route 0.0.0.0 0.0.0.0 209.165.200.226. What is the purpose of this command?
To provide a route to forward packets for which there is no route in the routing table
Which type of static route that is configured on a router uses only the exit interface?
Directly connected static route
Network administrator uses the command IP route 172.18.0.0255255.0.0S 0/01 to configure a floating static route on a router. That route will function as a back up route to either to reach the EIGRP learn Netwerk 172180.0/1/6. After this configuration, the EIGRP route is removed from the routing table even though EIGRP is still functioning properly why is the static route not functioning as intended as intended?
The administrative distance value is not high enough on the static route.
What type of static ground is created when the next up IP address in exit interface are specified?
Fully specified static route
What is the correct syntax of a floating static route?
The administrative distance on a floating static route is put at the end of the static route.
What static route statement shows a recursive IPv6 static route?
You know just pick the second to the longest one.
Network administrator is configuring a route to forward packets to a specific web server. What type of route should be configured by the administrator?
A host route.
Which command would create a valid IPv6 default route?
Just remember it’s the one with::/0
What is a characteristic of a default static route?
It identifies the gateway IP address to which the router sends all IP packets for which it does not have a learned or static route.
What is the purpose of a floating static route?
It allows an alternate connection to be used when the preferred link fails.
Which IPv6 static route would serve as a back up route to a dynamic route learn through OSPF?
For this one just remember that the administrative distance has to be greater than 110
Like command, or set of commands, would be used to determine if the following configuration on rather HQ works as designed?
To test a floating static brown take down the main route link in order to see whether the back up link appears in the routing table
Which type of static route typically uses the distance parameter in the IP route global configuration command
Floating static route
Why would a floating static ground be configured with an administrative distance that is higher than the administrative distance of a dynamic routing protocol that is running at the same router?
To be used as a back up route.
What network address and subnet mask combination would be used to create a default static route that matches any IP V4 destination?
0.0.0.0 0.0.0.0
True or false? R2 will forward frames to our three with all ones layer to address.
False
Which sequence correctly identifies the order of the steps that a router will perform when it receives a packet on an ethernet interface?
The router examines the destination Mac address.
The router identifies the ethernet type field
The router de encapsulates the ethernet frame
The router examines the destination IP address
Which three iOS troubleshooting commands can I help to isolate problems with a static route? Choose three.
Show IP interface brief
Ping
Show IP route
A network administrator has entered a static route to an ethernet land that is connected to an adjacent router. However the router is not shown in the routing table. Which command with the Administrator used to verify that the exit interface is up?
Show IP interface brief
Aesthetic route has been configured on a router. However, the destination network no longer exists. What should an administrator do to remove the static route from the routing table.
Remove the route using the no IP route command.
Which statement describes the sequence of process is executed by a router when it receives the packet from the host to be delivered to a host on another network
It didn’t caps leads the packet, selects the appropriate path, and encapsuates the packet to forward it toward the destination host.
I network engineer issues the show CDP neighbor command on several network devices during the process of network documentation. What is the purpose of performing this command?
To obtain information about directly connected Cisco devices.
A network administrator notices that correctly enter static Brown is not in the writing table. What to router commands could an administrator use to determine if the exit in her face was up in the next top address is available? Choose two.
Ping
Show IP interface brief
Network administrator has entered the following command:
IP route 192.168.10.64 255.255.255.192 serial 0/0/1
When the network administrator enters the command show IP route, the route is not in the routing table. What should the administrator do next?
Verify that the serial 0/0/1 interface is activin available.
What will a router do if it does not have a default route configured in a packet needs to be forwarded to a destination network that is not listed in the writing table?
Drop it
What does the C mean next in an entry in the output of the show IP route command?
It identifies a network that is directly connected to the router.
