CCNA2 MODULE 2

Which statement is true about broadcast and collision domains?

• • The size of the collision domain can be reduced by adding hubs to a network.

• • Adding a switch to a network will increase the size of the broadcast domain.

• • Adding a router to a network will increase the size of the collision domain.

• • The more interfaces a router has the larger the resulting broadcast domain.

What is one function of a Layer 2 switch?

• • forwards data based on logical addressing

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

• • duplicates the electrical signal of each frame to every port

• • learns the port assigned to a host by examining the destination MAC address

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

• aA hub divides collision domainas, and a switch divides broadcast domains.

• • Each port of a hub is a collision adomain, and each port of a switch is a broadcast domain.

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

• • A hub forwards frames, and a switch forwards only packets.

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.

• • Use ARP to resolve the port that is related to the frame.

  • Drop the frame.

• • Send the frame to the default gateway address.

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

• • high port density

• • fast port speed

• frame buffering

Which switching method makes use of the FCS value?

• broadcast

• large frame buffer

• store-and-forward

• cut-through

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

• • the memory space that is allocated to each switch port

• • the number of available ports

• • the speed of each port

• • the numbers of hosts that are connected to each switch port

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

• • the source MAC address and the incoming port

• • the source and destination MAC addresses and the incoming port

• • the source and destination MAC addresses and the outgoing port

• • the destination MAC address and the incoming port

• the source MAC address and the outgoing port

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

• • Half duplex has only one channel.

• • Full duplex increases the effective bandwidth.

• • Full duplex allows both ends to transmit and receive simultaneously.

• • Full duplex offers 100 percent potential use of the bandwidth.

• All modern NICS support both half-duplex and full-duplex communication.

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

• • source IP address

• • source MAC address

• • destination MAC address

• • destination IP address