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