Discovery 1 - Module 6

1)
  
A user types www.cisco.com into a web browser address textbox. What does www.cisco.com represent?
* the IP address of a web server
a physical network address
 the closest router interface to the source
 the source IP address in the data transmission

2)

What type of server would use IMAP?
 DNS
 DHCP
* e-mail
FTP
 Telnet
 web

3) 
 
Which type of server would most likely be used first by a network client in a corporate environment?
 DNS
* DHCP
e-mail
 FTP
 Telnet
 web

4)

Which protocol is used by FTP to transfer files over the Internet?
* TCP
SMTP
 UDP
 SNMP

5) 
 
Which protocols are TCP/IP application layer protocols? (Choose two.)
 UDP
* FTP
 IP
* SMTP
TCP

6)
  
Which of the following are layers of the TCP/IP model? (Choose three.)
* Application
 Physical
* Internet
* Network Access
Presentation

7)
 
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.

8)

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

9)
 
Which application is most likely used to translate www.cisco.com to 198.133.219.25?
 DHCP
* DNS
FTP
 HTTP
 POP
 SMTP

10)

 Refer to the graphic. Which protocol is used to access this website?
 IM
 FTP
* HTTP
SNMP
 VoIP

11)
 
Which port number is used by SMTP?
 20
 21
* 25
26
 110

12)
 
Which protocol is used by e-mail servers to communicate with each other?
 FTP
 HTTP
 TFTP
* SMTP
POP
 SNMP

13)
 
What client software enables logged in users to communicate with other logged in users in real time?
 blog
 e-mail
 web mail
* instant messaging

14)
 
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.

15)
 
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

16)
 
What three items are contained in an Ethernet frame? (Choose three.)
 source IP address
* source MAC address
 destination IP address
* destination MAC address
* error-checking information

17)
 
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

18)
 
Cabling issues are associated with which OSI layer?
 4
 2
* 1
3

19)
 
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

20)
  
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

21)
  
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.

22)
 
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

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