chapter 8

Switches: - learn addresses by reading the source and destination addresses - operate at the physical layer only - connect two or more network segments that use different data link protocols - connect two or more network segments that use different network protocols - have become less popular than hubs

learn addresses by reading the source and destination addresses

Routers: - operate at the application layer - operate only at the physical layer - cannot connect two or more networks that use the same type of cable - may also be called TCP/IP gateways - operate only at the data link layer

may also be called TCP/IP gateways

Computers can be assigned to a VLAN based on the ________. - IEEE 802.1q standard - NIC interface - physical port on the switch - IEEE 802.3 standard - physical location of the computer

physical port on the switch

Which of the following is not a way that a router differs from a switch? - routers can connect two or more networks that use the same data link protocol - routers only process messages that are specifically addressed to it - routers operate at the network layer - routers perform more processing on each message than switches do - routers can choose the "best" route between networks for forwarding a packet

routers can connect two or more networks that use the same data link protocol

Device performance on a backbone network will not be improved by: - using the same protocols in the backbone and the LANs - using static routing in low to moderate traffic conditions - ensuring that backbone devices have sufficient memory so that packets do not have to be retransmitted by the sender - translating packets from one protocol to another as they enter the BN - none of the options

translating packets from one protocol to another as they enter the BN

Which of the following is not a type of hardware device that can be used to interconnect networks? - layer 3 switches - routers - dumb terminals - layer 2 switches - all of the above can be used

dumb terminals

A VLAN network assigns computers to LAN segments by hardware. True False

False

A VLAN requires the computer manager to reconfigure the physical cables to the switch if a computer is moved from one port to another port on a switch. True False

False

A backbone network that connects many backbone networks spanning several buildings at a single location is often called an Internet backbone. True False

False

Layer-3 switches switch messages based only on their data link layer address. True False

False

Using ______ capabilities, network managers can connect VOIP phones directly into a VLAN switch and configure the switch to reserve sufficient network capacity so that they will always be able to send and receive voice messages. - backbone - switched - routed - QoS - access

QoS

A subnetted or hierarchical backbone can also be called: - Bridged backbone - Virtual LAN - Hubbed backbone - Collapsed backbone - Routed backbone

Routed backbone

_________ move packets along the backbone based on their network layer address. - Bridged backbones - Hubbed backbones - multistation access unit backbones - Routed backbones - NIC backbones

Routed backbones

Which of the following is not true about Layer-3 switches? - They switch messages based on their IP address. - They can be used in place of routers. - They function faster than routers. - They have more simultaneously active ports than routers. - They can only switch messages based on their data link layer addresses.

They can only switch messages based on their data link layer addresses.

Which of the following is true regarding switched backbones? - They place all network devices for one part of the building physically in the same room, often in a rack of equipment - They have an advantage of requiring less cable - They make it more difficult to move computers from one LAN to another - Network capacity is always tied to the physical location of the computers - They are harder to maintain and upgrade than a BN that is not rack-based

They place all network devices for one part of the building physically in the same room, often in a rack of equipment

A key advantage of a chassis switch is its flexibility. True False

True

Which of the following would not be part of an "ideal" backbone design? - access layer composed of 10/100 layer 2 Ethernet switches - distribution layer composed of layer 3 Ethernet switches of 100 (or 1000) Base-T - redundant switches - core layer composed of layer 3 Ethernet switches running 10 (or 40) GbE over fiber - coax cabling throughout LANs and BN

coax cabling throughout LANs and BN

Routers: - connect different IP networks or subnetworks - typically do not require any configuration by the network administrator - use data link layer addresses to move packets that leave the subnet - typically require only one TCP/IP address -do less processing on packets than a layer 2 switch does

connect different IP networks or subnetworks

The biggest drawbacks to VLANs are their________________ - cost and management complexity - size and contention - contention and cost - learning curve and contention - speed and size

cost and management complexity

Which of the following is not a technology layer that is considered when designing backbone networks? - access layer - distribution layer - decentralized layer - core layer - none of the options

decentralized layer