Switching/CEF Flashcards
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
Destination MAC address
What type of network device helps reduce the size of a collision domain?
Hub
Switch
Load balancer
Router
Switch
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
Destination IP address
What type of network device helps reduce the size of a broadcast domain?
Router
The _________ can be directly correlated to the MAC address table.
Adjacency table
CAM
TCAM
Routing table
CAM
A ___________ forwarding architecture provides increased port density and forwarding scalability.
Centralized
Clustered
Software
Distributed
Distributed
CEF is composed of which components? (Choose two.)
Routing Information Base
Forwarding Information Base
Label Information Base
Adjacency table
MAC address table
Forwarding Information Base
Adjacency Table
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?
Process switching
What types of packets require software handling?
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)
What is the default switching mechanism used by all Cisco platforms?
Cisco Express Forwarding (CEF)
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?
ternary content addressable memory (TCAM)
In type of forwarding does the route processor (RP) engine have a forwarding engine so that it can make all the packet switching decisions?
Centralized Forwarding
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?
Distributed Forwarding
What is built directly from the routing table and contains the next-hop IP address for each destination in the network?
Forwarding Information Base
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?
Adjacency table
What is a redundancy feature that allows a Cisco router with two RPs to synchronize router configuration and control plane state information?
Stateful switchover (SSO)
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
fast-switching cache
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.
Each routing protocol has its own RIB.
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
show running interface port-channel number
