Computer Networks

Transport control protocol is a connection oriented reliable protocol working at the transport layer. It is the main protocol in TCP/IP networks and enables two hosts to establish a connection and exchange streams of data.

Link Control Protocol: It is responsible for setting up a link between two computers over a circuit-switched telephone connection, and for resolving any issues of authentication.

PubSubHubbub is an open protocol for distributed publish/subscribe communication on the internet.

BitTorrent is a protocol for the practice of peer-to-peer file sharing that is used to distribute large amounts of data over the internet.

This type of IP address allocation in DHCP protocol is the one in which the host address is assigned by a network administrator.

This state of TCP connection is a waiting state or a close request state from the local application before sending a FIN.

This address in a BOOTP message format is the address of a BOOTP relay agent and not a general IP router to be used by the client.

This field in TCP segment format specifies the number of data bytes beginning with the one indicated in the acknowledgement number field that the receiver is willing to accept.

This option in TCP/IP segment format sends a time stamp value that indicates the current value of the time stamp clock of TCP.

This field in DHCP message format is set by the client to 0, incremented by a router that relays the request to another server and used to identify loops.

This type of port numbers are not required by the clients as they initiate communication with servers and the port number they are using is contained in the UDP/TCP datagrams sent to the server.

This option in TCP/IP datagram is a selective acknowledgement that allows the receiver to inform the sender about all the segments that are received successfully.

This flag in DNS message format bit signals to the name server that recursive resolution is asked for and the bit is copied to the response.

This field in DNS general resource record format is the one that specifies that time in seconds for which the resource record will be valid in a name server cache.

IMAP and POP3 are the two most commonly used Internet mail protocols for retrieving e-mails. IMAP stands for Internet Message Access Protocol and POP3 stands for Post Office Protocol 3.