Switching/CEF

Question 1

Forwarding of network traffic from a Layer 2 perspective uses what information?

Source IP address

Destination IP address

Source MAC address

Destination MAC address

Data protocol

Answer 1

Destination MAC address

Question 2

What type of network device helps reduce the size of a collision domain?

Hub

Switch

Load balancer

Router

Answer 2

Switch

Question 3

Forwarding of network traffic from a Layer 3 perspective uses what information?

Source IP address

Destination IP address

Source MAC address

Destination MAC address

Data protocol

Answer 3

Destination IP address

Question 4

What type of network device helps reduce the size of a broadcast domain?

Answer 4

Router

Question 5

The _________ can be directly correlated to the MAC address table.

Adjacency table

CAM

TCAM

Routing table

Answer 5

CAM

Question 6

A ___________ forwarding architecture provides increased port density and forwarding scalability.

Centralized

Clustered

Software

Distributed

Answer 6

Distributed

Question 7

CEF is composed of which components? (Choose two.)

Routing Information Base

Forwarding Information Base

Label Information Base

Adjacency table

MAC address table

Answer 7

Forwarding Information Base
Adjacency Table

Question 8

What is referred to as software switching or slow path, is a switching mechanism in which the general-purpose CPU on a router is in charge of packet switching?

Answer 8

Process switching

Question 9

What types of packets require software handling?

Answer 9

Packets sourced or destined to the router (using control traffic or routing protocols)

Packets that are too complex for the hardware to handle (that is, IP packets with IP options)

Packets that require extra information that is not currently known (for example, ARP)

Question 10

What is the default switching mechanism used by all Cisco platforms?

Answer 10

Cisco Express Forwarding (CEF)

Question 11

On a switch, what allows for upper-layer processing such as identifying the Layer 2/3 source/destination addresses, protocol, QoS markings, and so on?

Answer 11

ternary content addressable memory (TCAM)

Question 12

In type of forwarding does the route processor (RP) engine have a forwarding engine so that it can make all the packet switching decisions?

Answer 12

Centralized Forwarding

Question 13

If the line cards are equipped with forwarding engines so that they can make packet switching decisions without intervention of the RP, what is this known as?

Answer 13

Distributed Forwarding

Question 14

What is built directly from the routing table and contains the next-hop IP address for each destination in the network?

Answer 14

Forwarding Information Base

Question 15

What contains the directly connected next-hop IP addresses and their corresponding next-hop MAC addresses, as well as the egress interface’s MAC address?

Answer 15

Adjacency table

Question 16

What is a redundancy feature that allows a Cisco router with two RPs to synchronize router configuration and control plane state information?

Answer 16

Stateful switchover (SSO)

Question 17

In fast switching, after looking up the first packet that is destined for a particular IP network, which mechanism is used to find the destination?

EIGRP table
Forwarding Information Base
fast-switching cache
adjacency table

Answer 17

fast-switching cache

Question 18

Where is the route information from routing protocols such as OSPF, EIGRP, and BGP cached in Cisco Express Forwarding?

It is cached in the adjacency table.
It is cached in the FIB.
It is cached in one RIB.
Each routing protocol has its own RIB.

Answer 18

Each routing protocol has its own RIB.

Question 19

Which command would you run to confirm that both ends of an EtherChannel trunk are configured equally?

show running interface port-channel number
show etherchannel protocol
show etherchannel brief
show etherchannel summary

Answer 19

show running interface port-channel number