ch 1415

Which three protocols operate at the application layer of the TCP/IP model?

-FTP -POP3 -DCHP

Which three fields are used in a UDP segment header

-Length -Source Port -Checksum

Which two fields are included in the TCP header but not in the UDP header?

-window -sequence number

What is the complete range of TCP and UDP well-known ports

0-1023

PC is downloading a large file from a server. The TCP window is 1000 bytes. The server is sending the file using 100-byte segments. How many segments will the server send before it requires an acknowledgment from the PC?

10 segments

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.

hich flag in the TCP header is used in response to a received FIN 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.

Which protocol or service uses UDP for a client-to-server communication and TCP for server-to-server communication?

DNS

Which two characteristics are associated with UDP sessions

Destination devices receive traffic with minimal delay Received data is unacknowledged

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

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 kind of port must be requested from IANA in order to be used with a specific application?

Registered port

What is an advantage of SMB over FTP?​

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

Which transport layer feature is used to guarantee session establishment

TCP 3-way handshake

hich action is performed by a client when establishing communication with a server via the use of UDP at the transport layer

The client randomly selects a source port number.

Which three statements characterize UDP?

UDP provides basic connectionless transport layer functions. UDP relies on application layer protocols for error detection. UDP is a low overhead protocol that does not provide sequencing or flow control mechanisms.

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

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

application

Why does HTTP use TCP as the transport layer protocol?

because HTTP requires reliable delivery

Which networking model is being used when an author uploads one chapter document to a file server of a book publisher?

client/server

Which field in the TCP header indicates the status of the three-way handshake process?

control bits

What important information is added to the TCP/IP transport layer header to ensure communication and connectivity with a remote network device?

destination and source port numbers

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

peer-to-peer

What is a key characteristic of the peer-to-peer networking model?

resource sharing without a dedicated server

What information is used by TCP to reassemble and reorder received segments

sequence numbers

Which factor determines TCP window size?

the amount of data the destination can process at one time

What is a socket

the combination of a source IP address and port number or a destination IP address and port number

What is the function of the HTTP GET message?

to request an HTML page from a web server

Which two protocols may devices use in the application process that sends email?

-SMTP -DNS

Which three application layer protocols use TCP?

-SMTP -FTP -HTTP

Which three statements describe a DHCP Discover message?

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

Which two types of applications are best suited for UDP?

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

What are two roles of the transport layer in data communication on a network?

-identifying the proper application for each communication stream -tracking the individual communication between applications on the source and destination hosts

What are three responsibilities of the transport layer?

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

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

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

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

-session -presentation -application