Cisco 2 Module 2 Notes

Which port speed will be autonegotiated between a host with a 1 Gbps NIC connecting to a Cisco Catalyst 2960 switch with a 100 Mbps port?

100 mbps

Which device separates broadcast domains?

router

Which network device can serve as a boundary to divide a Layer 2 broadcast domain?

router

egress

used to describe the port that frames will use when leaving the device

ingress

used to describe the port where a frame enters the device.

Which type of address does a switch use to build the MAC address table?

source MAC address

Which two special characteristics do LAN switches use to alleviate network congestion? (Choose two.)

-fast port speeds -fast internal switching

Which two statements are true about half-duplex and full-duplex communications? (Choose two.)

-full duplex increases the effective bandwidth -full duplex allows both ends to transmit and receive simultaneously

cut-through switching

This method begins the forwarding process after the destination MAC address of an incoming frame and the egress port have been determined.

store-and-forward switching

This method makes a forwarding decision on a frame after it has received the entire frame and checked the frame for errors using a mathematical error-checking mechanism known as a cyclic redundancy check (CRC).

What is the significant difference between a hub and a Layer 2 LAN switch?

a switch creates many smaller collision domains, and a hub increases the size of a single collision domain.

Which statement is true about broadcast and collision domains?

adding a switch to a network will increase the size of the broadcast domain

What is one function of a Layer 2 switch?

determines which interface is used to forward a frame based on the destination MAC address

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?

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

Which switch characteristic helps alleviate network congestion when a 10 Gbps port is forwarding data to a 1 Gbps port?

frame buffering

high port density

lowers overall costs because it reduces the number of switches required.

Which switching method makes use of the FCS value?

store-and-forward

Which option correctly describes a switching method?

store-and-forward: ensures that the frame is free of physical and data-link errors

Which network device can be used to eliminate collisions on an Ethernet network?

switch

What is the purpose of frame buffers on a switch?

the hold traffic, thus alleviating network congestion

What does the term "port density" represent for an Ethernet switch?

the number of available ports

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

the source MAC address and the incoming port