Jawaban IT Essentials II Module 3 (v 3.0)

Module 3


1
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

2
Which term refers to the path that signals take from one point on a net work to another?
address resolution
logical topology
dynamic host configuration
physical topology

3
Which data link layer device can segment a network into different collision domains?
a router
a switch
a gateway
a transceiver

4
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.

5
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.

6
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

7
Which two devices are at the core of wireless communications? (Choose two.)
satellites
light emitting diodes
transmitters
receivers
modulators

8
How many bits are in an IP address?
16
64
32
48

9
What is the main function of the DNS?
to scan the network for viruses
to translate computer names t o their corresponding IP addresses
to assign IP addresses to nodes on the network
to provide names to all the nodes on a network

10
What are three important considerations when selecting a NIC? (Choose three.)
network type
operating system
system bus
network media
number of network users

11
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

12
What are the two most common wireless networking technologies? (Choose two.)
radio frequency
microwave
laser
infrared
satellite wavelength

13
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

14
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.

15
What are three options for assigning logical addresses to hosts? (Choose three.)
static
dynamic
negotiation
automatic
holistic

16
Which of the following devices is used to segment a network into different broadcast
domains?
switch
active hub
bridge
router

17
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.

18
What is the most commonly used architecture in Ethernet LANs?
bus
star
mesh
ring

19
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.

20
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.
 

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