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CCNA > Routing and Switching > Flashcards

Routing and Switching Flashcards

1
Q

Refer to the exhibit. Which highlighted value represents a specific destination network in the routing table?

A

10.16.100.128*

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2
Q

A router has used the OSPF protocol to learn a route to the 172.16.32.0/19 network. Which command will implement a backup floating static route to this network?

A

ip route 172.16.32.0 255.255.224.0 S0/0/0 200*

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3
Q

Refer to the exhibit. Currently router R1 uses an EIGRP route learned from Branch2 to reach the 10.10.0.0/16 network. Which floating static route would create a backup route to the 10.10.0.0/16 network in the event that the link between R1 and Branch2 goes down?

A

ip route 10.10.0.0 255.255.0.0 209.165.200.225 100

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4
Q

To enable RIP routing for a specific subnet, the configuration command network 172.16.64.32 was entered by the network administrator. What address, if any, appears in the running configuration file to identify this network?

A

172.16.0.0

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5
Q

Refer to the exhibit. What is the administrative distance value that indicates the route for R2 to reach the 10.10.0.0/16 network?

A

1

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6
Q

Which route will a router use to forward an IPv4 packet after examining its routing table for the best match with the destination address

A

a level 1 ultimate route*

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7
Q

Refer to the exhibit. An administrator is attempting to install an IPv6 static route on router R1 to reach the network attached to router R2. After the static route command is entered, connectivity to the network is still failing. What error has been made in the static route configuration

A

The interface is incorrect*

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8
Q

What is a basic function of the Cisco Borderless Architecture access layer?

A

provides access to the user*

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9
Q

What is a characteristic of the distribution layer in the three layer hierarchical model?

A

provides access to the rest of the network through switching, routing, and network access policies*

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10
Q

Which information does a switch use to populate the MAC address table?

A

the source MAC address and the incoming port*

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11
Q

Which statement is correct about Ethernet switch frame forwarding decisions?

A

Frame forwarding decisions are based on MAC address and port mappings in the CAM table*

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12
Q

What is the name of the layer in the Cisco borderless switched network design that would have more switches deployed than other layers in the network design of a large organization?

A

access

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13
Q

A network administrator is configuring a new Cisco switch for remote management access. Which three items must be configured on the switch for the task? (Choose three.)

A

loopback address
default VLAN
IP address

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14
Q

A network technician has been asked to secure all switches in the campus network. The security requirements are for each switch to automatically learn and add MAC addresses to both the address table and the running configuration. Which port security configuration will meet these requirements?

A

sticky secure MAC addresses

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15
Q

Refer to the exhibit. What protocol should be configured on SW-A Port 0/1 if it is to send traffic from multiple VLANs to switch SW-B?

A

IEEE 802.1Q*

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16
Q

What will a Cisco LAN switch do if it receives an incoming frame and the destination MAC address is not listed in the MAC address table

A

Forward the frame out all ports except the port where the frame is received.*

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17
Q

What will a Cisco LAN switch do if it receives an incoming frame and the destination MAC address is not listed in the MAC address table?
Drop the frame.
Send the frame to the default gateway address.
Use ARP to resolve the port that is related to the frame.
Forward the frame out all ports except the port where the frame is received

A

Forward the frame out all ports except the port where the frame is received

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18
Q

What VLANs are allowed across a trunk when the range of allowed VLANs is set to the default value?
The switches will negotiate via VTP which VLANs to allow across the trunk
Only VLAN 1 will be allowed across the trunk.
Only the native VLAN will be allowed across the trunk
All VLANs will be allowed across the trunk

A

All VLANs will be allowed across the trunk

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19
Q

Refer to the exhibit. A network administrator is configuring inter-VLAN routing on a network. For now, only one VLAN is being used, but more will be added soon. What is the missing parameter that is shown as the highlighted question mark in the graphic?
It identifies the type of encapsulation that is used.
It identifies the VLAN number.
It identifies the subinterface.
It identifies the number of hosts that are allowed on the interface.
It identifies the native VLAN number.

A

It identifies the VLAN number *

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20
Q

A network administrator is designing an ACL. The networks 192.168.1.0/25, 192.168.0.0/25, 192.168.0.128/25, 192.168.1.128/26, and 192.168.1.192/26 are affected by the ACL. Which wildcard mask, if any, is the most efficient to use when specifying all of these networks in a single ACL permit entry?

  1. 0.0.127
  2. 0.0.255
  3. 0.1.255
  4. 0.255.255
A

0.0.1.255

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21
Q 
The computers used by the network administrators for a school are on the 10.7.0.0/27 network. Which two commands are needed at a minimum to apply an ACL that will ensure that only devices that are used by the network administrators will be allowed Telnet access to the routers? (Choose two.)
access-class 5 in*
access-list 5 deny any
access-list standard VTY
permit 10.7.0.0 0.0.0.127
access-list 5 permit 10.7.0.0 0.0.0.31*
ip access-group 5 out
ip access-group 5 in
A

access-list 5 permit 10.7.0.0 0.0.0.31*

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22
Q 
A network engineer has created a standard ACL to control SSH access to a router. Which command will apply the ACL to the VTY lines?
access-group 11 in
access-class 11 in*
access-list 11 in
access-list 110 in
A

access-class 11 in*

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23
Q

What is the reason why the DHCPREQUEST message is sent as a broadcast during the DHCPv4 process?
for hosts on other subnets to receive the information
to notify other hosts not to request the same IP address
for routers to fill their routing tables with this new information
to notify other DHCP servers on the subnet that the IP address was leased

A

to notify other DHCP servers on the subnet that the IP address was leased

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24
Q

Refer to the exhibit. A network administrator is configuring a router as a DHCPv6 server. The administrator issues a show ipv6 dhcp pool command to verify the configuration. Which statement explains the reason that the number of active clients is 0?

The default gateway address is not provided in the pool.
No clients have communicated with the DHCPv6 server yet.
The IPv6 DHCP pool configuration has no IPv6 address range specified.
The state is not maintained by the DHCPv6 server under stateless DHCPv6 operation

A

The state is not maintained by the DHCPv6 server under stateless DHCPv6 operation

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25
Q

Refer to the exhibit. R1 has been configured as shown. However, PC1 is not able to receive an IPv4 address. What is the problem?​

A

A DHCP server must be installed on the same LAN as the host that is receiving the IP address.
R1 is not configured as a DHCPv4 server.​
The ip address dhcp command was not issued on the interface Gi0/1.
The ip helper-address command was applied on the wrong interface.

26
Q

Refer to the exhibit. Which statement shown in the output allows router R1 to respond to stateless DHCPv6 requests?
ipv6 unicast-routing
ipv6 nd other-config-flag
ipv6 dhcp server LAN1
prefix-delegation 2001:DB8:8::/48 00030001000E84244E70
dns-server 2001:DB8:8::8

A 
ipv6 unicast-routing
ipv6 nd other-config-flag *
ipv6 dhcp server LAN1
prefix-delegation 2001:DB8:8::/48 00030001000E84244E70
dns-server 2001:DB8:8::8
27
Q

What is used in the EUI-64 process to create an IPv6 interface ID on an IPv6 enabled interface?
the MAC address of the IPv6 enabled interface
a randomly generated 64-bit hexadecimal address
an IPv6 address that is provided by a DHCPv6 server
an IPv4 address that is configured on the interface

A

the MAC address of the IPv6 enabled interface

28
Q

Refer to the exhibit. NAT is configured on Remote and Main. The PC is sending a request to the web server. What IPv4 address is the source IP address in the packet between Main and the web server?

  1. 130.5.76
  2. 165.200.245
  3. 0.113.5
  4. 16.1.10
  5. 0.2.1
  6. 165.200.226
A

203.0.113.5

29
Q 
Which type of traffic would most likely have problems when passing through a NAT device?
Telnet
IPsec
HTTP
ICMP
DNS
A

IPsec

30
Q

Refer to the exhibit. Which two statements are correct based on the output as shown in the exhibit? (Choose two.)
The host with the address 209.165.200.235 will respond to requests by using a source address of 209.165.200.235
The output is the result of the show ip nat translations command*
Traffic with the destination address of a public web server will be sourced from the IP of 192.168.1.10.
The host with the address 209.165.200.235 will respond to requests by using a source address of 192.168.10.10
The output is the result of the show ip nat statistics command

A

The host with the address 209.165.200.235 will respond to requests by using a source address of 192.168.10.10

31
Q

A small company has a web server in the office that is accessible from the Internet. The IP address 192.168.10.15 is assigned to the web server. The network administrator is configuring the router so that external clients can access the web server over the Internet. Which item is required in the NAT configuration?
an IPv4 address pool
an ACL to identify the local IPv4 address of the web server
the keyword overload for the ip nat inside source command
the ip nat inside source command to link the inside local and inside global addresses

A

the ip nat inside source command to link the inside local and inside global addresses

32
Q

Refer to the exhibit. Based on the output that is shown, what type of NAT has been implemented?
static NAT with a NAT pool
static NAT with one entry
dynamic NAT with a pool of two public IP addresses
PAT using an external interface

A

PAT using an external interface

33
Q

Which two statements are correct if a configured NTP master on a network cannot reach any clock with a lower stratum number? (Choose two.)

  1. The NTP master will claim to be synchronized at the configured stratum number.
  2. An NTP server with a higher stratum number will become the master.
  3. Other systems will be willing to synchronize to that master using NTP.
  4. The NTP master will be the clock with 1 as its stratum number.
  5. The NTP master will lower its stratum number.
A
  1. The NTP master will claim to be synchronized at the configured stratum number.
  2. Other systems will be willing to synchronize to that master using NTP.
34
Q

What are three functions provided by the syslog service? (Choose three.)

  1. to specify the destinations of captured messages
  2. to periodically poll agents for data
  3. to select the type of logging information that is captured
  4. to gather logging information for monitoring and troubleshooting
  5. to provide traffic analysis
A
  1. to specify the destinations of captured messages
  2. to select the type of logging information that is captured
  3. to gather logging information for monitoring and troubleshooting
35
Q

When a customer purchases a Cisco IOS 15.0 software package, what serves as the receipt for that customer and is used to obtain the license as well?

  1. Software Claim Certificate
  2. Unique Device Identifier
  3. End User License Agreement
  4. Product Activation Key
A
  1. Product Activation Key
36
Q

R1# copy running-config tftp
Address or name of remote host [ ]?

When the router prompts for an address or remote host name, what IP address should the administrator enter at the prompt?

  1. 192.168.10.2
  2. 192.168.11.252
  3. 192.168.11.254
  4. 192.168.9.254
  5. 192.168.10.1
A
  1. 192.168.11.252
37
Q

Which configuration would be appropriate for a small business that has the public IP address of 209.165.200.225/30 assigned to the external interface on the router that connects to the Internet?

A
  1. access-list 1 permit 10.0.0.0 0.255.255.255 ip nat inside source list 1 interface serial 0/0/0 overload
38
Q

Refer to the exhibit. Host A has sent a packet to host B. What will be the source MAC and IP addresses on the packet when it arrives at host B?

A
  1. Source MAC: 00E0.FE91.7799 Source IP: 10.1.1.10
39
Q

What benefit does NAT64 provide?

  1. It allows sites to use private IPv6 addresses and translates them to global IPv6 addresses.
  2. It allows sites to connect multiple IPv4 hosts to the Internet via the use of a single public IPv4 address.
  3. It allows sites to connect IPv6 hosts to an IPv4 network by translating the IPv6 addresses to IPv4 addresses.
  4. It allows sites to use private IPv4 addresses, and thus hides the internal addressing structure from hosts on public IPv4 networks.
A
  1. It allows sites to connect IPv6 hosts to an IPv4 network by translating the IPv6 addresses to IPv4 addresses.
40
Q

What is the effect of configuring the ipv6 unicast-routing command on a router?

  1. to assign the router to the all-nodes multicast group
  2. to enable the router as an IPv6 router
  3. to permit only unicast packets on the router
  4. to prevent the router from joining the all-routers multicast group
A
  1. to enable the router as an IPv6 router
41
Q

What is a characteristic of a static route that creates a gateway of last resort?

  1. It backs up a route already discovered by a dynamic routing protocol.
  2. It uses a single network address to send multiple static routes to one destination address.
  3. 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
  4. It is configured with a higher administrative distance than the original dynamic routing protocol has.
A
  1. 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
42
Q

Refer to the exhibit. Which command will properly configure an IPv6 static route on R2 that will allow traffic from PC2 to reach PC1 without any recursive lookups by router R2?

A
  1. R2(config)# ipv6 route 2001:db8:10:12::/64 S0/0/0
43
Q

Which network design may be recommended for a small campus site that consists of a single building with a few users?

  1. a network design where the access and distribution layers are collapsed into a single layer
  2. a network design where the access and core layers are collapsed into a single layer
  3. a collapsed core network design
  4. a three-tier campus network design where the access, distribution, and core are all separate layers, each one with very specific functions
A
  1. a collapsed core network design
44
Q

Which information does a switch use to keep the MAC address table information current?

  1. the destination MAC address and the incoming port
  2. the destination MAC address and the outgoing port
  3. the source and destination MAC addresses and the incoming port
  4. the source and destination MAC addresses and the outgoing port
  5. the source MAC address and the incoming port
  6. the source MAC address and the outgoing port
A
  1. the source MAC address and the incoming port
45
Q

Which characteristic describes cut-through switching?

  1. Frames are forwarded without any error checking.
  2. Error-free fragments are forwarded, so switching accurs with lower latency.
  3. Buffering is used to support different Ethernet speeds.
  4. Only outgoing frames are checked for errors.
A
  1. Error-free fragments are forwarded, so switching accurs with lower latency.
46
Q

What is a result of connecting two or more switches together?

  1. The number of broadcast domains is increased.
  2. The size of the broadcast domain is increased.
  3. The number of collision domains is reduced.
  4. The size of the collision domain is increased.
A
  1. The size of the broadcast domain is increased.
47
Q

Refer to the exhibit. Inter-VLAN communication between VLAN 10, VLAN 20, and VLAN 30 is not successful. What is the problem?

A
  1. The switch interface FastEthernet0/1 is configured as an access interface and should be configured as a trunk interface.
48
Q

A network administrator is configuring an ACL with the command access-list 10 permit 172.16.32.0 0.0.15.255. Which IPv4 address matches the ACE?

A
  1. 172.16.47.254
49
Q

Refer to the exhibit. A PC at address 10.1.1.45 is unable to access the Internet. What is the most likely cause of the problem?

A
  1. The NAT pool has been exhausted.
50
Q

What is indicated by the M in the Cisco IOS image name c1900-universalk9-mz.SPA.153-3.M.bin?

  1. a maintenance deployment release
  2. a minor release
  3. a mainline release
  4. an extended maintenance release
A
  1. an extended maintenance release
51
Q

Refer to the exhibit. A network engineer is preparing to upgrade the IOS system image on a Cisco 2901 router. Based on the output shown, how much space is available for the new image?

A
  1. 221896413 bytes
52
Q

Refer to the exhibit. Based on the exhibited configuration and output, why is VLAN 99 missing?

A
  1. because the VLAN 99 has not been manually entered into the VLAN database with the vlan 99 command
53
Q

Refer to the exhibit. Router R1 has an OSPF neighbor relationship with the ISP router over the 192.168.0.32 network. The 192.168.0.36 network link should serve as a backup when the OSPF link goes down. The floating static route command ip route 0.0.0.0 0.0.0.0 S0/0/1 100 was issued on R1 and now traffic is using the backup link even when the OSPF link is up and functioning. Which change should be made to the static route command so that traffic will only use the OSPF link when it is up?​

A
  1. Change the administrative distance to 120.
54
Q

Refer to the exhibit. All hosts and router interfaces are configured correctly. Pings to the server from both H1 and H2 and pings between H1 and H2 are not successful. What is causing this problem?

A
  1. RIPv2 is misconfigured on router R2.
55
Q

What caused the following error message to appear?01:11:12: %PM-4-ERR_DISABLE: psecure-violation error detected on Fa0/8, putting Fa0/8 in err-disable state

01: 11:12: %PORT_SECURITY-2-PSECURE_VIOLATION: Security violation occurred, caused by MAC address 0011.a0d4.12a0 on port FastEthernet0/8.
01: 11:13: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/8, changed state to down.
01: 11:14: %LINK-3-UPDOWN: Interface FastEthernet0/8, changed state to down.

A
  1. Port security was enabled on the switch port, and an unauthorized connection was made on switch port Fa0/8.
56
Q

Refer to the exhibit. A small business uses VLANs 2, 3, 4, and 5 between two switches that have a trunk link between them. What native VLAN should be used on the trunk if Cisco best practices are being implemented?

A

5

57
Q

Which statement describes a characteristic of the extended range VLANs that are created on a Cisco 2960 switch?

  1. They are numbered VLANs 1002 to 1005.
  2. They cannot be used across multiple switches.
  3. They are reserved to support Token Ring VLANs.
  4. They are not stored in the vlan.dat file.
A
  1. They are not stored in the vlan.dat file.
58
Q

What is used in the EUI-64 process to create an IPv6 interface ID on an IPv6 enabled interface?

  1. the MAC address of the IPv6 enabled interface
  2. a randomly generated 64-bit hexadecimal address
  3. an IPv6 address that is provided by a DHCPv6 server
  4. an IPv4 address that is configured on the interface
A
  1. the MAC address of the IPv6 enabled interface
59
Q

Refer to the exhibit. NAT is configured on RT1 and RT2. The PC is sending a request to the web server. What IPv4 address is the source IP address in the packet between RT2 and the web server?

A
  1. 209.165.200.245
60
Q

A company has an internal network of 172.16.25.0/24 for their employee workstations and a DMZ network of 172.16.12.0/24 to host servers. The company uses NAT when inside hosts connect to outside network. A network administrator issues the show ip nat translations command to check the NAT configurations. Which one of source IPv4 addresses is translated by R1 with PAT?

A
  1. 172.16.25.35

CCNA (8 decks)

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