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Jumat, 26 Oktober 2012

Exam Viewer - DHomesb Chapter 6 - CCNA Discovery: Networking for Home and Small Businesses (Version 4.0)

1.   What type of server would use IMAP?
DNS
DHCP
e-mail
FTP
Telnet
web
2.   A network client in a corporate environment reboots. Which type of server would most likely be used first?
DNS
DHCP
e-mail
FTP
Telnet
web
3.   Which protocol is used by FTP to transfer files over the Internet?
TCP
SMTP
UDP
SNMP
4.   Which protocols are TCP/IP application layer protocols? (Choose two.)
UDP
FTP
IP
SMTP
TCP
5.   Which of the following are layers of the TCP/IP model? (Choose three.)
Application
Physical
Internet
Network Access

Presentation
6.   You are creating a network-based video game. What influences your decision about which transport protocol to use for the application?
UDP will not disrupt the game to retransmit dropped packets.
TCP provides extra acknowledgements that will ensure smooth video delivery.
Both TCP and UDP can be used simultaneously to ensure speed and guaranteed delivery.
Both TCP and UDP may slow transmission and disrupt game operation, so no transport protocol should be used.
7.   Whenever e-mail clients send letters, what device is used to translate the domain names into their associated IP addresses?
Uniform Resource Locator
Network redirector server
SNMP server
DNS server
8.   A network administrator needs to allow web pages on the company web server to be accessed securely. What port number is used to request web content to be transmitted using a secure protocol?
53
69
80
443
9.   Which port number is used by SMTP?
20
21
25
26
110
10.   Which protocol is used by e-mail servers to communicate with each other?
FTP
HTTP
TFTP
SMTP
POP
SNMP
11.   A computer user encounters an issue when printing a document. Which application could a computer user use to contact technical support to gain an immediate answer to an issue?
blog
e-mail
web mail
instant messaging
virtual reality
virtualization
12.   An Internet server is running both FTP and HTTP services. How does the server know which of these applications should handle an incoming segment?
The packet header identifies it as an HTTP or FTP packet.
The data in the segment is specially formatted for either HTTP or FTP.
The segment destination port number identifies the application that should handle it.
The source port number is associated with one of these well known server applications.
13.   What term is used to describe how TCP/IP protocols are layered and interact to format, address, and transmit information across a network?
protocol hierarchy
protocol modeling
protocol stack
protocol layering
14.   What information is contained in an IP header?
source and destination IP addresses
source and destination MAC addresses
only destination IP and MAC addresses
both source and destination IP and MAC addresses
15.   Cabling issues are associated with which OSI layer?
4
2
1
3
16.   A device receives an Ethernet frame and recognizes the MAC address as its own. What does the device do to the message to get to the encapsulated data?
removes the IP header
removes the TCP header
passes data to the application layer
removes the Ethernet header and trailer
17.   A client has decoded a frame and started the de-encapsulation process. In which order does the de-encapsulation process occur?
1) remove IP header
2) remove Ethernet header and trailer
3) remove TCP header
4) pass data to the application
1) add TCP header to data
2) add an IP header
3) add frame header and trailer
4) encode the frame into bits 
1) remove Ethernet header and trailer
2) remove IP header
3) remove TCP header
4) pass data to the application 
1) add TCP header to data
2) add Ethernet header and trailer
3) add an IP header
4) encode the frame into bits

18.   What is an advantage of the use of layers in the OSI reference model?
It breaks network communications into larger parts.
It increases complexity.
It prevents changes in one layer from affecting other layers.
It requires the use of single-vendor equipment for hardware and software communications.
19.   What is the correct order of the layers of the OSI reference model, starting at the lowest layer and working up the model?
data link, physical, transport, network, presentation, session, application
physical, data link, network, session, transport, presentation, application
physical, data link, network, transport, presentation, session, application
physical, data link, network, transport, session, presentation, application
application, session, presentation, transport, data link, network, physical
20.   What three items are contained in an Ethernet header and trailer? (Choose three.)
source IP address
source MAC address
destination IP address
destination MAC address
error-checking information

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