Jawaban IT Essentials II Module 2 (v 3.0)

Module 2


1
What does the term
media access control
describe?
the rules for coordinating the use of the medium
a list of users allowed to use the network
the system administrator's role in controlling access to the network
how to determine which media type is best for a network

2
Which two types of cabling will support 100BASE-X? (Choose two.)
Category 2
Category 5
two-strand fiber-optic
50-ohm coaxial

3
What is one disadvantage of a client/server network?
It can have a single point of failure.
It does not scale well to large networks.
It requires each user to be trained to perform administrative tasks.
It is less secure than a peer-to-peer network.

4
Peer-to-peer and client/server networks share many characteristics. What is unique to
the client/server environment?
Passwords may be required to access shared resources.
Local data files and devices can be shared by several users.
Computers typically communicate using request/response protocols.
Security and resource management scales easily as the network grows.

5
Why are open source technologies appealing to many people?
A more organized source of funding and development is available.
Proprietary technologies involve cooperation between many companies.
De facto standards allow for more choice.
Users are not bound by copyright laws.

6
Which of the following statements best describes full-duplex transmission?
Data can be sent across bus hubs and switches.
Data can be simultaneously sent and received.
Data can only be sent in one direction.
Data can be sent and then received.

7
Which access control method is specified in the IEEE 802.3 standard?
CSMA/CA
CSMA/CD
token passing
store and forward

8
What is the physical topology when all the computers in a network connect to a central
point?
point-to-point
star
ring
bus

9
Which of the following statements is true of print sharing?
It requires a company to purchase more printers.
It ma kes it more difficult for an administrator to control printers.
It allows for more efficient use of printers.
It limits the user to a single network printer.

10
Which statement is true of peer-to-peer networks?
They scale easily as the size of the network grows.
Security is easily maintained.
Computers may change roles from client to server as needed.
At least one computer functions as a dedicated server.

11
What is a major advantage of UTP?
It is inexpensive.
It is highly resistant to electromagnetic interference.
It limits the number of hosts on a network.
It is an inexpensive way to interconnect remote locations.

12
Which technology provides the best support for upload-intensive Internet tasks?
ISDN
cable modem service
analog modem service
ADSL

13
What do transport layer protocols use to identify the application needed to process
data?
ports
MAC addresses
IP addresses
DNS
flags

14
Which statement best describes a serial link?
Bits of information are transmitted across the link one after another.
Bits of information are randomly transmitted across the link.
Bits of information are sent across a dedicated link in one direction only.
Bits of information are only sent using dial-up or ISDN lines.

15
What is one advantage of directory and name services?
All directories are kept in a single location.
User names have a standardized format.
Text names are easier to remember than numeric addresses.
Network resources are bound to a physical location.

16
What is an advantage of Linux?
Linux is easy to use.
With copyrights, Linux experiences fast technological growth.
Linux is free for public use.
Linux has an organized source of development.

17
What is the purpose of protocols?
to provide a controlled sequence of messages between syst ems
to define which users have access to the network
to allow the network administrator to decentralize control
to limit access to network resources

18
Which of the following is the most popular physical LAN topology?
ring
star
bus
fiber

19
Which DSL technology is most commonly used?
SDSL
ADSL
VDSL
IDSL

20
Which network layer protocol enables routers to discover the best path between
networks using hop count?
IP
RIP
ARP
OSPF

21
Which of the following works as a "storage and retrieval" application?
Telnet
e-mail
DNS
SNMP

22
Which features are LANs generally designed to accommodate?
many users, high speed, limited geographical area
many users, high speed, broad geographical area
few users, low speed, limited geographical area
few users, low speed, broad geographical area
23
What are two advantages of Windows over Linux? (Choose two.)
Windows can be used publicly for free.
Windows is easier to use than Linux.
Unlike Linux, Windows is standardized through the efforts of many independent
sources.
Unlike Linux, Windows has an organized source of funding and development.
 

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