CCNA 1 Flashcards
Which technology supports the stateless assignment of IPv6 addresses
Authconfiguration
What are two requirements for an HSRP group
Exactly one active router,
Exactly one standby active router
What is HSRP
Hot standby router protocol
What is DHCP
Dynamic Host Configuration Protocol
What is SLACC
Stateless Address Autoconfiguration
After you configure the loopback0 interface, which command can you enter to verify the status of the interface and determine whether fast switching is enabled?
Show ip interface loopback 0
Which command sequence can you enter to create VLAN 20 and assign it to an interface on a switch?
vlan 20
interface g x/y
switchport access vlan 20
Which three commands can you use to set a router boot image?
Router(config)#boot system flash c4500-p-mz.121-20.bin
Router(config)#boot system tftp c7300-js-mz.122-33.sB8a.bin
Router(config)#boot system rom c3701-advispservicesk9-mz.124-24.T4.bin
[Router(config)#boot system]
Which two statements about IPv6 and routing protocols are true?
Link-local addresses are used to form routing adjacencies.
OSPFv3 was developed to support IPv6 routing.
If primary and secondary root switches with priority of 16384 both experience catastrophic losses, which tertiary switch can take over?
a switch with priority 20480 (The largest priority number)
Which two statements about late collisions are true?
The may indicate a duplex mismatch.
By definition, they occur after the 512th bit of the frame has been transmitted.
Which command can you enter to set the default route for all traffic to an interface
router(config)#ip route 0.0.0.0 0.0.0.0 g0/1
[default route]
Which two spanning-tree port states does RSTP combine to allow faster convergence
Blocking
Listening
If a router has four interfaces and each interface is connected to four switches, how many broadcast domains are present on the router
4
What does a crossover cable connect?
switch to switch
What does a straight-through cable connect?
switch access port to router
What does a rollover cable connect?
PC COM to switch Console port
What layer of the OSI are packets
Network layer
What layer of the OSI is udp
Transport layer
What layer of the OSI is an ip address
Network Layer
What layer of the OSI are segments
Transport Layer
What layer of the OCI is windowing
Transport Layer
What layer of the OCI is routing
Network Layer
Which command enables IPv6 forwarding on a cisco router
ipv6 unicast-routing
What is the most appropriate summarization for routes:
- 0.0.0
- 0.1.0
- 0.2.0
- 0.3.0
10.0.0.0 /22
Which set of commands is recommended to prevent the use of a hub in the access layer
switch(config-if)#switchport mode access
switch(config-if)#switchport port-security maximum 1
A router has learned three possible routes that could be use to reach a destination network. One route is from eIRGP and has a composite metric of 20514560. Another route is from OSPF with a metric of 782. The last is from RIPv2 and has a metric of 4. Which route or routes will the router install in the routing table?
the eIGRP route
Two routers names Atlanta and Brevard are connected via their serial interfaces but they are unable to communicate. The Atlanta router has the correct configuration. What is the fault on the Brevard router.
incompatible encapsulation (one is HDLC and one is PPP)
A network administrator needs to configure a serial link between the main office and a remote location. The router at the remote office is a non-cisco router. How should the main office router be configured to make the connection
Main(config)#interface s0/0
main(config-if)#ip address 172.16.1.1 255.255.255.252
main(config-if)#encapsulation ppp
no shut
Which layer 2 protocol encapsulation type supports sychronous and asynchronous circuits and has built-in security mechanisms?
PPP
The two connected ports on the switch are not turning orange or green. What would be the most effective steps to troubleshoot this physical layer problem.
ensure that cables A and B are straight-through cables.
ensure the switch has power
reseat all cables
A network administrator is troubleshooting the OSPF configuration of routers R1 and R2. The routers cannot establish an adjacency relationship on their common ethernet link. The graphic shows the output of the show ip ospf interface command for routers R1 and R2. Based on the information in the graphic, what is the cause of this problem.
The hello and dead timers are not configured properly.
What will happen if a private IP address is assigned to an interface connected to an ISP?
Addresses in a private range will not be routed on the internet backbone.
Refer to the exhibit. The Bigtime router is unable to authenticate to the Littletime router. What is the cause of the problem
The passwords aren’t the same.
What will be the result if the following configuration commands are implemented on a Cisco switch?
switch(config-if)#switchport port-security
switch(config-if)#switchport port-security mac-address sticky
A dynamically learned MAC address is saved to the running configuration file.
Refer to the exhibit. The following commands are executed on the interface f0/1 of 2950 switch
2950switch(config-if)#switchport port-security
2950switch(config-if)#switchport port-security mac-address sticky
2950switch(config-if)switchport port-security maximum 1
the ethernet frames that is shown arrives on interface f0/1. What 2 functions will occur when this frame is received by 2950Switch?
only host A will be allowed to transmit frames on F/1
All frames arriving on 2950switch with a destination of 0000.00aa.aaaa will be forwarded out f0/1.
Which command would you configure globally on a Cisco router that would allow you to view directly connected Cisco devices?
cdp run
A Cisco router is booting and has just completed the POST process. It is now ready to find and load an IOS image. What function does the router perform next?
It checks the configuration register.
What are the three advantages of vlans
Vlans establish broadcast domains in switched networks
vlans allow access to network services based on department not physical location
vlans can greatly simplify adding, moving, or changing hosts on the network.
Refer to the exhibit. The output that is shown is generated at a switch. Which three statements are true?
All ports will be in a state of discarding, learning, or forwarding
the bridge priority is lower than the default value for spanning tree.
All designated ports are in a forwarding state.
Which two commands can be used to verify a trunk link configuration status on a given Cisco switch interface
show interface trunk
show interface switchport
Which two states are the port states when RSTP has converged?
Discarding
forwarding
Refer to the exhibit. A technician has installed Switch B and needs to configure it for remote access from the management workstation connected to Switch A. Which set of commands is required to accomplish this task.
switchB(config)#ip default-gateway 192.168.8.254
switchB(config)#interface vlan 1
switchB(config-if)#ip address 192.168.8.252 255.255.255.0
switchB(config-if)#no shutdown
Which of the following are benefits of vlans
They allow logical grouping of users by function
They can enhance network security
They increase the number of broadcast domains while decreasing the size of the broadcast domains.
What are three benefits of implementing Vlans
A higher level of network security can be reached by separating sensitive data traffic from other network traffic.
A more efficient use of bandwidth can be achieved allowing many logical networks to use the same network infrastructure.
Broadcast storms can be mitigated by increasing the number of broadcast domains, thus reducing their size.
Which three statements accurately describe layer 2 ethernet switches?
Establishing vlans increases the number of broadcast domains
Microsegmentation decreases the number of collisions on the network
In a properly functioning network with redundant switched path each switched segment will contain one root bridge with all its ports in the forwarding state. All other switches in that broadcast domain will have only one root port.
Which of the following correctly describes steps in the OSI data encapsulation process?
The transport layer divides a data stream into segments and may add reliability and flow control information.
Packets are created when the network layer adds Layer 3 addresses and control information to a segment.
Which of the following describes the rules of devices in a WAN?
A CSU/DSU terminates a digital local loop
A modem terminates an analog local loop.
A router is commonly considered a DTe device.
Which interface counter can you use to diagnose a duplex mismatch problem?
Late collisions
Which feature can you implement to reserve bandwidth for VoIP calls
RSVP
When an interface is configured with PortFast BPDU guard, how does the interface respond when it receives a BPDU?
It goes into an errdiable state
What are three characteristics of the TCP protocol?
The connection is established before data is transmitted.
It ensures that all data is transmitted and received by the device.
It uses separate SYN and ACK messages to establish a connection
Which command can you enter to determine whether serial interface 0/2/0 has been configured using HDLC encapsulation
router#show interfaces s0/2/0
Which two statements about IPv4 multicast traffic are true?
It uses a minimum amount of network bandwidth
What are two benefits of private IPv4 IP addresses?
They are less costly than public IP addresses
they can be assigned to devices without Internet connections.
What is the authoritative source for an address lookup?
a recursive DNS search
Which command can you enter to verify that a BGP connection to a remote device is established.
show ip bgp summary
During which phase of PPoe is PPP authentication performed?
The PPP session phase
Which tress circumstances can cause GRE tunnel to be in an up/down state?
The tunnel interface is down
A valid route to the destination address is missing from the routing table
The tunnel address is routed through the tunnel itself.
Which two statements about using leased lines for your WAN infrastructure are true?
Leased lines require little installation and maintenance expertise.
Leased lines provide highly flexible bandwidth scaling.
