IT Ess 2 Modul 3

1 What is the most commonly used architecture in Ethernet LANs?

bus
*star
mesh
ring

2 Which list contains important considerations when selecting a NIC to use on a network?

type of network, type of RAM, type of system bus
*type of media, type of system bus, type of RAM
type of network, type of media, type of system bus
type of system bus, processor speed, type of media

3 Which of the following options correctly describes APIPA?

*APIPA allows a privately addressed host to assign itself a public IP address in order to access a remote network.
APIPA enables a computer to assign itself an IP address if it cannot contact a DHCP server.
APIPA is fault-tolerant feature that allows a server to mirror another server on a local network.
APIPA enables a computer to translate domain names into IP addresses if it cannot contact a DNS server.

4 What is a major disadvantage of the bus topology?

It is expensive.
It requires a lot of cabling.
*A break in any one part of the cable brings down the entire network.
All computers must be placed in a straight line.

5 Which two of the following statements accurately describe a default gateway? (Choose two.)

A default gateway is used when a host transfers data to another host on the same network segment.
A default gateway is the IP address assigned to the near-side router interface.
A default gateway is the IP address assigned to the near-side switch interface.
*A default gateway is used when a host transfers data to a host on another network segment.

6 What are two advantages of using dynamic address assignment instead of manual address assignment? (Choose two.)

*On a large network, manually assigning addresses can be very time consuming.
Manual address assignment requires network administrators to understand physical addressing.
*Dynamic address assignment can help segment a large network.
Manual address assignment requires network administrators to understand logical addressing.

7 Which of the following statements best describes DNS?

DNS servers are used to map an IP address to a physical address.
*DNS servers are used to map a name to an IP address.
DNS servers are used to configure logical address information for host computers.
DNS servers are used to translate from private addresses to public addresses.

8 Which two devices are at the core of wireless communications? (Choose two.)

satellites
light emitting diodes
*transmitters
*receivers
modulators

9 Which list indicates advantages associated with fiber-optic cable?

capable of running long distances, inexpensive to install, not susceptible to electromagnetic interference
not susceptible to electromagnetic interference, expensive to install, lower data rates
*not susceptible to electromagnetic interference, higher data rates, capable of running long distances
lower data rates, inexpensive to install, capable of running long distances

10 Which of the following devices is used to segment a network into different broadcast domains?

switch
active hub
bridge
*router

11 What is the purpose of the twists in Category 5/5e UTP cable?

to prevent the cable from breaking
to make the cable easier to install and terminate properly
to make the cable cheaper to produce
*to limit signal degradation caused by cross talk

12 How many bits are in an IP address?

16
64
*32
48

13 What are three important considerations when selecting a NIC? (Choose three.)

*network type
operating system
*system bus
*network media
number of network users

14 Which data link layer device can segment a network into different collision domains?

a router
*a switch
a gateway
a transceiver

15 What is the main function of the DNS?

to scan the network for viruses
*to translate computer names to their corresponding IP addresses
to assign IP addresses to nodes on the network
to provide names to all the nodes on a network

16 What is the function of a DHCP server?

It stores websites that are used frequently.
*It dynamically assigns IP addresses to hosts.
It determines the subnet mask of a network.
It serves as a "first line of defense" firewall.


17 Which term refers to the path that signals take from one point on a network to another?

address resolution
*logical topology
dynamic host configuration
physical topology

18 Which three of the following items can a DHCP server provide to a host computer? (Choose three.)

*subnet mask
MAC address
*default gateway
*IP address
DHCP server address

19 What are three options for assigning logical addresses to hosts? (Choose three.)

*static
*dynamic
negotiation
*automatic
holistic

20 What are the two most common wireless networking technologies? (Choose two.)

*radio frequency
microwave
laser
*infrared
satellite wavelength