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

What is the correct order of the layers of the OSI reference model, starting at the lowest layer and working up the model?

physical, data link, network, transport, session, presentation, application

What three items are contained in an Ethernet header and trailer? (Choose three.)

source MAC address

destination MAC address

error-checking information

Which protocols are TCP/IP application layer protocols? (Choose two.)

FTP

SMTP

Refer to the graphic. Which protocol is used to access this website?

HTTP

What is an advantage of the use of layers in the OSI reference model?

It prevents changes in one layer from affecting other layers.

What term is used to describe how TCP/IP protocols are layered and interact to format, address, and transmit information across a network?

protocol stack

Whenever e-mail clients send letters, what device is used to translate the domain names into their associated IP addresses?

DNS server

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 segment destination port number identifies the application that should handle it.

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.

Which port number is used by SMTP?

25

Which application is most likely used to translate www.cisco.com to 198.133.219.25?

DNS

Which of the following are layers of the TCP/IP model? (Choose three.)

Application

Internet

Network Access

Which protocol is used by e-mail servers to communicate with each other?

SMTP

What client software enables logged in users to communicate with other logged in users in real time?

instant messaging

What type of server would use IMAP?

e-mail

What resolves a website URL to an IP address?

DNS server

What information is contained in an IP header?

source and destination IP addresses

Which protocol is used by FTP to transfer files over the Internet?

TCP

A client has decoded a frame and started the de-encapsulation process. In which order does the de-encapsulation process occur?

1) remove Ethernet header and trailer

2) remove IP header

3) remove TCP header

4) pass data to the application

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 Ethernet header and trailer

Cabling issues are associated with which OSI layer?

1

A network client in a corporate environment reboots. Which type of server would most likely be used first?

DHCP