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chapter 6

STUDY
PLAY
If you purchase a new desktop computer today, what type of expansion board NIC is it most likely to contain?
PCI
If you purchase a new laptop today, what type of NIC is it most likely to have?
On-Board
Which two of the following IRQs could you probably assign to a NIC without causing a conflict with preassigned devices?
11
A certain computer on your fast Ethernet network seems to be acting sluggish. After ensuring the 10/100 Mbps NIC is not malfinctioning, you decide to find out whether its configured to transfer data at 10 Mbps rather than 100 Mbps, as it should be. How could you find this information and change it, if necessary?
By modifying the NIC properties through the operating system
Suppose computers on your home office network are connected to a single hub (A), but now you need to expand the network. You purchase another hub (B). Assuming you use a straight-through (not a crossover) cable, what port on hub A will you use to connect it to hub B?
Any open port except the uplink port
You and a friend decide to set up Fast Ethernet networks in your respective houses connct a half-dozen computers. Both of you will connect your networks to high-speed Internet connections. As the connectivity device for end nodes, you purchase a router, whereas your friend purchases a 12-port hub. Which of the following willl your network do that your friends network wont do?
Allow other connectivity devices to be added to the network in the future
You are a network technician working on a 100-Base-T network. A coworker has been having trouble logging on to the server and asks whether you can quickly tell her if her workstations NIC is operating properly. You do not have the NIC's utility disk on hand, but you look at the back of her workstation and learn that although the NIC is properly installed and connected to the network, somethings wrong with it. What might you have seen that causes you to come to this conclusion?
Its activity LED is blinking green
How do bridges keep track of whether they should forward or filter frames?
They maintain a fitering database that identifies which frames can be filtered and which should be forwarded, based on their destination MAC adress
Which of the following is an advantage of using switches rather than hubs?
Switching can assign dedicated channels to every node making their transmission more secure
What potential problem does STP (Spanning Tree Protocol) address?
A broadcast storm
In cut-through switching, which frame field does the switch never read?
Frame check sequence
You are asked to configure a backbone switch that connects servers supplying oceanic and atmospheric data to mariners and pilots around the world. Your networks traffic load is very high at all times, day and night. What type of switching do you configure the switch to use?
Store-and-forward switching
Which of the following devices separates collision domains?
Bridge, Switch, Router
Suppose your companys network contains two seperate VLANs computer A is on the customer service VLAN and computer B is on the warehouse VLAN. Besides a layer 2 switch, what device is required for computer A and computer B to exchange data?
Router
Which of the following devices can act as a gateway?
Router, Desktop Workstation, Laptop
Why cant routers forward packets as quickly as bridges can?
Routers operate at layer 3 of the OSI model and, therefore take more time to interpret logical addressing information
In STP, what device acts as a guide to setting the best paths between switches?
Root bridge
What switching technique allows you to funnel traffic belonging to more than one VLAN through a single switch interface?
Trunking
Which of the following identifies the VLAN to which each piece of data belongs?
A tag added to each frames header
Which of the following routing protocols is used on the Internets backbone?
BGP
Which of the following types of routing allows routers to exchange information about best paths with their neighboring routers only?
Distance-Vector
Why is a large busy network more likely to use dynamic routing?
Dynamic routing automatically selects the most efficient route between nodes, reducing the possibility for human error
A packet on a network using the RIP routing method has been passed from one connectivity device to another 15 times. What happens when it gets passed to one more device?
It is discarded
What is the main difference between a layer 3 switch and a router?
A layer 3 switch is optimized for fast data handling; a router is optimized for accurate data delivery
At which layers of the OSI model are gateways capable of functioning?
At all layers