Chapter 10: Application Layer

What is an advantage of SMB over FTP?​

SMB clients can establish a long-term connection to the server.​

What part of the URL, http://www.cisco.com/index.html, represents the top-level DNS domain?

.com

Which three statements describe a DHCP Discover message? (Choose three.)

1) All hosts receive the message, but only a DHCP server replies. 2) The message comes from a client seeking an IP address. 3) The destination IP address is 255.255.255.255.

What are two characteristics of the application layer of the TCP/IP model? (Choose two.)

1) Closest to the end user. 2) The creation and maintenance of dialogue between source and destination applications.

Which two definitions accurately describe the associated application layer protocol? (Choose two.)

1) DNS - resolves internet names to IP addresses. 2) Telnet - provides remote access to servers and networking devices.

A user is attempting to access http://www.cisco.com/ without success. Which two configuration values must be set on the host to allow this access? (Choose two.)

1) DNS server 2) Default gateway

A manufacturing company subscribes to certain hosted services from its ISP. The services that are required include hosted world wide web, file transfer, and e-mail. Which protocols represent these three key applications? (Choose three.)

1) FTP 2) HTTP 3) SMTP

Which two tasks can be performed by a local DNS server? (Choose two.)

1) Forwarding name resolution requests between servers 2) Mapping name-to-IP addresses for internal hosts

Which three protocols or standards are used at the application layer of the TCP/IP model? (Choose three.)

1) HTTP 2) MPEG 3) GIF

The application layer of the TCP/IP model performs the functions of what three layers of the OSI model? (Choose three.)

1) Presentation 2) Application 3) Session

Which three layers of the OSI model provide similar network services to those provided by the application layer of the TCP/IP model? (Choose three.)

1) Session Layer 2) Application Layer 3) Presentation Layer

How is NSLOOKUP used?

A network administration command-line tool available for many computer operating systems for querying the Domain Name System (DNS) to obtain domain name or IP address mapping or for any other specific DNS record.

What is an example of network communication that uses the client-server model?

A workstation initiates a DNS request when the user types www.cisco.com in the address bar of a web browser.

What do the client/server and peer-to-peer network models have in common?

Both models support devices in server and client roles.

What is true about the Server Message Block protocol?

Clients establish a long term connection to servers.

The HTTP message type used by the client to request data from the web server is the _________________ message.

GET

What is a common protocol that is used with peer-to-peer applications such as WireShare, Bearshare, and Shareaza?

Gnutella

Which application layer protocol uses message types such as GET, PUT, and POST?

HTTP

What is the acronym for the protocol that is used when securely communicating with a web server? ​

HTTPS

When retrieving email messages, which protocol allows for easy, centralized storage and backup of emails that would be desirable for a small- to medium-sized business?

IMAP

Why is DHCP preferred for use on large networks?

It is a more efficient way to manage IP addresses than static address assignment.

What is an advantage for small organizations of adopting IMAP instead of POP?

Messages are kept in the mail servers until they are manually deleted from the email client.

Which protocol can be used to transfer messages from an email server to an email client?

POP3

Which application layer protocol is used to provide file-sharing and print services to Microsoft applications?

SMB

What is FTP?

The File Transfer Protocol (FTP) is a standard network protocol used to transfer computer files between a client and server on a computer network. FTP is built on a client-server model architecture and uses separate control and data connections between the client and the server.

What is true about a client-server network?

The network includes a dedicated server.

On a home network, which device is most likely to provide dynamic IP addressing to clients on the home network?

a home router

Which phrase describes an FTP daemon?

a program that is running on an FTP server.

Which TCP/IP model layer is closest to the end user?

application

Which layer in the TCP/IP model is used for formatting, compressing, and encrypting data?

application layer

Which command is used to manually query a DNS server to resolve a specific host name?

nslookup

Two students are working on a network design project. One student is doing the drawing, while the other student is writing the proposal. The drawing is finished and the student wants to share the folder that contains the drawing so that the other student can access the file and copy it to a USB drive. Which networking model is being used?

peer-to-peer

A wired laser printer is attached to a home computer. That printer has been shared so that other computers on the home network can also use the printer. What networking model is in use?

peer-to-peer (P2P)

What type of information is contained in a DNS MX record?

the domain name mapped to mail exchange servers

True or False? In FTP transactions, an FTP client uses the pull method to download files from an FTP server.

true