ComNet Exam Review

Which type of interface transmits one bit at a time?

Serial Port

Which of the following best describes a NIC?

A printed circuit board that provides network communication

Which of the following commands will send multiple IP packets to a specified destination?

ping

How many usable class C networks are created with a subnet mask of 255.255.255.240

14

Which of the following best describes a LAN?

A network that connects workstations, terminals, and other devices in a geographically limited area

Which of the following is used to describe the rated throughput capacity of the given network medium?

Bandwidth

Which protocol data units are forwarded by a router?

Packets

Which of the following CAT-cables is used to connect a PC to a PC

crossover cable

Which of the following cables is used to connect a router to the serial port of PC?

a console cable

Which of the following are known issues with wireless networks?

number of overlapping cells and security of transmission

Which of the following is the difference between multi-mode and single-mode FDDI (fiber optic) media?

Single-mode is capable of higher bandwidths than multi-mode

Which of the following is a characteristic of fiber optic cable

It is capable of higher data rates than other types of networking media

Which of the following describes attenuation?

a loss of signal strength

Which of the following is a cause of crosstalk?

AC line noise coming from a nearby video monitor and hard drive

How does a hub or a repeater affect the size of a collision domain?

It enlarges it

Which of the following will cause a collision on an Ethernet network?

Two or more nodes transmitting at the same time

Which networking device can make traffic forwarding decisions based on IP address?

Router

Which of the following manages communication between a specific Layer 2 LAN technology and network layer protocol?

LLC

Which of the following describes MAC addresses

The first six hexadecimal digits identify manufacturer and the last six digits identify the device.

What is the maximum length of the CAT-6 cable?

100 meters

Which of the following best describes TTL (time to live) filed that is replied from ping packet?

To indicate the number of hops a packet can traverse before it is discarded

Which of the following is a drawback of the CSMS/CD media access control protocol?

collisions can decrease network performance

Which of the following switching techniques must be used for asynchronous switching?

Store-and-forward

Which protocol data units are forwarded by a switch?

Frames

Mr. Pipat has been hired as the network admin of a local company and has decided to add more hubs to the company network. Which of the following has been caused by Pipat’s inexperience?

collision domain extended

Which of the following addresses is an example of a broadcast address of a Class B network with a 16-bit subnet mask?

146\.14.255.255

How many usable host addresses are available on a Class C network with a default subnet mask?

254

When is an ARP request made?

When a source knows the destination IP address but not the MAC address

What is the destination address of an ARP request?

A broadcast MAC address

What type of routing uses information that is manually entered into the routing table?

Static routing

How many host bits are available in the subnet mask 255.255.248.0

11

What is the primary function of routing protocols?

They enable routers to exchange routing tables