CISCO 2 CHAPTER 2

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

1. Which statement is true about broadcast and collision domains? Adding a router to a network will increase the size of the collision domain. The size of the collision domain can be reduced by adding hubs to a network. The more interfaces a router has the larger the resulting broadcast domain. Adding a switch to a network will increase the size of the broadcast domain.

source MAC address

10. Which type of address does a switch use to build the MAC address table? source IP address source MAC address destination IP address destination MAC address

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

11. Which option correctly describes a switching method? store-and-forward: forwards the frame immediately after examining its destination MAC address cut-through: makes a forwarding decision after receiving the entire frame store-and-forward: ensures that the frame is free of physical and data-link errors cut-through: provides the flexibility to support any mix of Ethernet speeds

Router

12. Which network device can serve as a boundary to divide a Layer 2 broadcast domain? Ethernet hub access point Ethernet bridge Router

They hold traffic, thus alleviating network congestion.

13. What is the purpose of frame buffers on a switch? They provide temporary storage of the frame checksum. They hold traffic, thus alleviating network congestion. They execute checksum values before transmission. They provide a basic security scan on received frames.

Switch

14. Which network device can be used to eliminate collisions on an Ethernet network? Hub Switch Router Firewall

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

2. What is one function of a Layer 2 switch? learns the port assigned to a host by examining the destination MAC address 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 forwards data based on logical addressing

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

3. What is the significant difference between a hub and a Layer 2 LAN switch? Each port of a hub is a collision domain, 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 divides collision domains, and a switch divides broadcast domains. A hub forwards frames, and a switch forwards only packets.

Forward the frame out all ports except the port where the frame is received.

4. 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? Send the frame to the default gateway address. Drop the frame. 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.

frame buffering

5. Which switch characteristic helps alleviate network congestion when a 10 Gbps port is forwarding data to a 1 Gbps port? high port density fast internal switching fast port speed frame buffering store-and-forward ; 6. Which switching method makes use of the FCS value? cut-through broadcast large frame buffer store-and-forward

the number of available ports

7. What does the term "port density" represent for an Ethernet switch? the speed of each port the numbers of hosts that are connected to each switch port the number of available ports the memory space that is allocated to each switch port

the source MAC address and the incoming port

8. Which information does a switch use to keep the MAC address table information current? the source MAC address and the incoming port o the source and destination MAC addresses and the outgoing port o the source MAC address and the outgoing port o the destination MAC address and the outgoing port o the destination MAC address and the incoming port o the source and destination MAC addresses and the incoming port

Full duplex increases the effective bandwidth., Full duplex allows both ends to transmit and receive simultaneously.

9. Which two statements are true about half-duplex and full-duplex communications? (Choose two.) All modern NICs support both half-duplex and full-duplex communication. Full duplex increases the effective bandwidth. Half duplex has only one channel. Full duplex allows both ends to transmit and receive simultaneously. Full duplex offers 100 percent potential use of the bandwidth.