CCNA 3 Chapter 6 v6 Exam Answers

When an EIGRP-enabled router uses a password to accept routes from other EIGRP-enabled routers, which mechanism is used?

EIGRP authentication allows a router to accept routing information only from other routers that are configured with the same password.

Which three metric weights are set to zero by default when costs in EIGRP are being calculated? (Choose three.)

By default, k1 and k3 are set to one and k2, k4, and k5 are set to zero during cost calculation by the EIGRP process. There is no k6 value.

Which command or commands must be entered on a serial interface of a Cisco router to restore the bandwidth to the default value of that specific router interface?

The command used to restore the default bandwidth on a serial interface of a Cisco router is no bandwidth. The default bandwidth on most, but not all, Cisco router serial interfaces is 1544 kb/s.

Which two factors does an EIGRP router use to determine that a route to a remote network meets the feasible condition and is therefore loop-free? (Choose two.)

Which statement describes a characteristic of the delivery of EIGRP update packets?

EIGRP uses a reliable delivery protocol to send update packets. Depending on the need, EIGRP may send update packets with unicast or multicast. For example, update packets are sent as a multicast when required by multiple routers, or as a unicast when required by only a single router.

Match the correct version of EIGRP with the EIGRP features. (Not all options are used.)

Refer to the exhibit. R3 has two possible paths to the network. What is the reported distance of the feasible successor route?

A feasible successor route is a backup route to the primary successor route, displayed as the second subentry in the command output. The reported distance of the feasible successor route for the network is 2816.​

Which destination MAC address is used when a multicast EIGRP packet is encapsulated into an Ethernet frame?

When an EIGRP multicast packet is encapsulated into an Ethernet frame, the destination MAC address is 01-00-5E-00-00-0A.

What is identified within the opcode of an EIGRP packet header?

The EIGRP packet header opcode is used to identify the EIGRP packet type: update (1), query (3), reply (4), and hello (5)​.

A new network administrator has been asked to verify the metrics that are used by EIGRP on a Cisco device. Which two EIGRP metrics are measured by using static values on a Cisco device? (Choose two.)

Bandwidth and delay are static values that are not actually tracked by a device. Load and reliability are tracked dynamically by a device over a default period of time. MTU is not used for EIGRP metrics.


Fill in the Blank. Use the abbreviation.
EIGRP uses the protocol ___ to deliver EIGRP packets to neighbors.

What is the purpose of using protocol-dependent modules in EIGRP?

EIGRP is designed to route several network layer protocols by using the PDMs. For example, EIGRP can be used to route both IPv4 and IPv6, as well as other network layer protocols. There is a separate instance of PDM for different network layer protocols.

Fill in the blank.
In an EIGRP topology table, a route that is in a/an ____ state will cause the Diffusing Update Algorithm to send EIGRP queries that ask other routers for a path to this network.

Refer to the exhibit. Which two networks contain feasible successors? (Choose two.)

Feasible successors are installed in the EIGRP routing table when the successor becomes unavailable. Feasible successors are backup routes that are have a metric higher than that of successors.

Order the precedence in which an EIGRP router would choose the router ID. (Not all options are used.)

If all router Ethernet interfaces in an EIGRP network are configured with the default EIGRP timers, how long will a router wait by default to receive an EIGRP packet from its neighbor before declaring the neighbor unreachable?

EIGRP uses the hold time as the maximum time it should wait for receiving a hello packet (or other EIGRP packets) from its neighbor before declaring that the neighbor is unreachable. By default the hold time is 3 times greater than the hello interval. On LAN interfaces, the default hello time is 5 seconds and the default hold time is 15 seconds.

Why would a network administrator use a wildcard mask in the network command when configuring a router to use EIGRP?

A network administrator wants to verify the default delay values for the interfaces on an EIGRP-enabled router. Which command will display these values?

The show interfaces command is used to show the delay, in microseconds, of a specified interface. This command will also provide the default delay value or an administratively configured value. The show running-config command will only display an administratively configured value. The commands show ip route and show ip protocols will not provide the delay value of each interface.

Which configuration is necessary to ensure successful operation of EIGRP for IPv6?

By default, the EIGRP for IPv6 process is in a shutdown state. The EIGRP for IPv6 process must be activated by using the no shutdown command within router configuration mode.

An administrator issues the router eigrp 100 command on a router. What is the number 100 used for?

The router eigrp 100 command uses the number as a process-id to keep track of the running instance of the EIGRP process, as several EIGRP processes can be run at the same time. This number is called autonomous system number.


Which two EIGRP packet types are sent with unreliable delivery? (Choose two.)

The update, query, and reply EIGRP packet types require reliable delivery.

What information does EIGRP maintain within the routing table?

Open the PT Activity. Perform the tasks in the activity instructions and then answer the question. Which code is displayed on the web server?

To complete the activity:

1. Enable IPv6 routing globally on R2 using the ipv6 unicast-routing command
2. Configure IPv6 EIGRP on the router, assign the router IP, and enable it, using the following commands:
ipv6 router eigrp 100
eigrp router-id
no shutdown
3. Configure the Gi0/0 and S0/0/0 interfaces with the ipv6 eigrp 100 command
To test your configuration:
On PC0, click on the Desktop tab, open the web browser, and type

Which table is used by EIGRP to store all routes that are learned from EIGRP neighbors?

Refer to the exhibit. R2 has two possible paths to the network. What would make the alternate route meet the feasibility condition?

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