Term
TCP
(Transmission Control Protocol) |
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Definition
| A core protocol of the TCP/IP suite. TCP belongs to the transport layer and provides reliable data delivery services. |
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Term
FTP
(File Transfer Protocol) |
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Definition
| An application used to transfer files. |
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Term
UDP
(User Datagram Protocol) |
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Definition
| A core protocol in the TCP/IP suite that sits in the transport layer of the OSI model. UDP is a connectionless transport service |
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Term
TCP/IP suite
(Transmission Control Protocol/Internet Protocol) |
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Definition
| A suite of networking protocols that includes TCP, IP, UDP, and many others. TCP/IP provides the foundation for data exchange across the internet. |
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Term
DHCP
(Dynamic Host Configuration Protocol) |
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Definition
| This program automatically assigns an IP address to computers on a network. It also prevents duplicate IP addresses. |
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Term
TFTP
(Trivial File Transfer Protocol) |
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Definition
| A TCP/IP application layer protocol that enables file transfers between computers. Unlike FTP, TFTP relies on UDP at the transport layer and does not require a user to log on to the remote host. |
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Term
DNS
(Domain Name Service/Domain Name Server/ Domain Name System) |
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Definition
| A naming system that resolves fully qualified domain names to IP addresses. |
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Term
HTTP(S)
(Hypertext Transfer Protocol Secure) |
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Definition
| The URL prefix that indicates that a Web page requires its data to be exchanged between client and server using SSL encryption. HTTPS uses the TCP port number 443 rather than port 80. Port 80 is mainly use HTTP. |
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Term
ARP
(Address Resolution Protocol) |
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Definition
| This program figures out MAC addresses based on the destination of an IP address. |
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Term
SIP (VoIP)
(Session Initiation Protocol) |
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Definition
| A protocol suite codified by the ILTF (in RFC2543) as a set of Session layer signaling and control protocols for multiservice, packet-based networks. With few exceptions, SIP performs much the same functions as the H.323 signaling protocols perform. SIP was developed as a more efficient alternative to H.323 before H.323 was revised to expedite its call setup functions. But although SIP is more efficient, because it was released later, it has never enjoyed the same widespread usage as H.323. |
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Term
RTP (VoIP)
(Real Time Protocol) |
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Definition
| A transport layer protocol used with voice and video transmission. RTP operates on top of UDP and provides information about packet sequence to help receiving nodes detect delay and packet loss. It also assigns packets a timestamp that corresponds to when the data in the packet was sampled from the voice or video stream. This timestamp helps the receiving node synchronize incoming data. |
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Term
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Definition
| A connection utility that provides authentication and encryption. With SSH, you can securely log on to a host, execute commands on that host, and copy files to or from that host, and copy files to or from that host. SSH encrypts data exchanged throughput the session. |
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Definition
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NTP
(Network Time Protocol) |
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Definition
| - A TCP/IP protocol used to synchronize the real-time clock in computers, network devices and other electronic equipment that is time sensitive. It is also used to maintain the correct time in NTP-based wall and desk clocks. |
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Term
IMAP4
(Internet Message Access Protocol version 4) |
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Definition
| An alternative to POP3, this program retrieves email from an email server. |
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Definition
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SMTP
(Simple Mail Transfer Protocol) |
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Definition
| The application layer TCP/IP subprotocol responsible for moving messages from one e-mail server to another. |
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Definition
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ICMP
(Internet Control Message Protocol) |
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Definition
| A protocol that’s connectionless and only consists of a single packet for messages. |
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Term
TLS
(Transport Layer Security) |
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Definition
| A version of SSL being standardized by the IETF (Internet Engineering Task Force). With TLS, the IETF aims to create a version of SSL that encrypts UDP as well as TCP transmissions. TLS, which is supported by new Web browsers, uses slightly different encryption algorithms than SSL but otherwise is very similar to the most recent version of SSL. |
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