cyber ccna 14-15

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

- All hosts receive the message, but only a DHCP server replies - The message comes from a client seeking an IP address - The destination IP address is 255.255.255.255

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?

- FTP - HTTP - SMTP

Which three application layer protocols use TCP? (Choose three)

- HTTP - FTP - SMTP

What are three responsibilities of the transport layer? (Choose three)

- Identifying the applications and services on the client and server that should handle transmitted data - Multiplexing multiple communication streams from many users or applications on the same network - Meeting the reliability requirements of applications, if any

Which three protocols operate at the application layer of the TCP/IP model? (Choose three.)

- POP3 - FTP - DHCP

Which two characteristics are associated with UDP sessions? (Choose two)

- Received data is unacknowledged - Destination devices receive traffic with minimal delay

Which three statements characterize UDP? (Choose three)

- UDP relies on application layer protocols for error detections - UDP is a low overhead protocol that does not provide sequencing or flow control mechanisms - UDP provides basic connection less transport layer functions

Which two types of applications are best suited for UDP? (Choose two)

- applications that can tolerate some data loss, but require little or no delay - applications that handle reliability themselves

What are two characteristics of peer-to-peer networks? (Choose two)

- resource sharing without a dedicated server - decentralized resources

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)

- session layer - application layer - presentation layer

In what two situations would UDP be better than TCP as the preferred transport protocol? (Choose two)

- when applications do not need to guarantee delivery of the data - when a faster delivery mechanism is needed

A PC that is communicating with a web server has a TCP window size of 6,000 bytes when sending data and a packet size of 1,500 bytes. Which byte information will the web server acknowledge after it has received two packets of data from the PC?

3001

A client creates a packet to send to a server. The client is requesting HTTP service. What number will be used as the destination port number in the sending packet?

80

Which scenario describes a function provided by the transport layer?

A student has two web browser windows open in order to access two web sites. The transport layer ensures the correct web page is delivered to the correct browser window

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

Which flag in the TCP header is used in response to a received PIN in order to terminate connectivity between two network devices?

ACK

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

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

Gnutella

Which protocol is used by a client to communicate securely with a web server?

HTTPS

How are port numbers used in the TCP/IP encapsulation process?

If multiple conversations occur that are using the same service, the source port number is used to track the separate conversations

What does a client do when it has UDP datagrams to send?

It just sends the datagrams

What is an advantage of SMB over FTP?

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

What is the function of the HTTP GET message?

To request an HTML page from a web server

What is a characteristic of UDP?

UDP reassembles the received datagrams in the order they were received

Which OSI layer provides the interface between the applications used to communicate and the underlying network over which messages are transmitted?

application

Why does HTTP use TCP as the transport layer protocol?

because HTTP requires reliable delivery

In what networking model would eDonkey, eMule, BitTorrent, Bitcoin, and LionShare be used?

peer-to-peer

What information is used by TCP to reassemble an reorder received segments?

sequence numbers

[client sends FIN] A client application needs to terminate a TCP communication session with a server. Place the termination process steps in the order that they will occur (Not all options are used)

step 1

[server sends ACK] A client application needs to terminate a TCP communication session with a server. Place the termination process steps in the order that they will occur (Not all options are used)

step 2

[server sends FIN] A client application needs to terminate a TCP communication session with a server. Place the termination process steps in the order that they will occur (Not all options are used)

step 3

[client sends ACK] A client application needs to terminate a TCP communication session with a server. Place the termination process steps in the order that they will occur (Not all options are used)

step 4

Which factor determines TCP window size?

the amount of data the destination can process at one time

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

the domain name mapped to mail exchange servers