TCP/IP Tutorial and Technical Overview by IBM Redbooks

By IBM Redbooks

The TCP/IP protocol suite has develop into the de facto commonplace for laptop communications in present day networked global. the ever present implementation of a selected networking common has ended in a major dependence at the functions enabled through it. this day, we use the TCP/IP protocols and the web not just for leisure and knowledge, yet to behavior our company through appearing transactions, trading items, and supplying prone to buyers. we're continuously extending the set of functions that leverage TCP/IP, thereby using the necessity for additional infrastructural help. In TCP/IP educational and Technical evaluate, we take an in-depth investigate the TCP/IP protocol suite. partly I, we introduce TCP/IP, delivering a simple knowing of the underlying innovations necessary to the protocols. We proceed our dialogue partially II with a survey of modern-day preferred TCP/IP program protocols, together with rising instant and multimedia purposes. ultimately, partially III, we conceal complicated options and the newest infrastructural traits in networking, together with IPv6, safeguard, caliber of carrier, IP mobility, and MPLS. We deal with the demanding situations that TCP/IP is presently dealing with and the expertise being built to beat them.

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TCP/IP Tutorial and Technical Overview

The TCP/IP protocol suite has develop into the de facto normal for machine communications in brand new networked global. the ever present implementation of a selected networking usual has ended in a big dependence at the purposes enabled by way of it. at the present time, we use the TCP/IP protocols and the web not just for leisure and knowledge, yet to behavior our company via appearing transactions, trading items, and supplying providers to clients.

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Before a link is considered to be ready for use by network-layer protocols, a specific sequence of events must happen. The LCP provides a method of establishing, configuring, maintaining, and terminating the connection. LCP goes through the following phases: 1. Link establishment and configuration negotiation: In this phase, link control packets are exchanged and link configuration options are negotiated. Once options are agreed upon, the link is open, but not necessarily ready for network-layer protocols to be started.

STD 3 – Host Requirements This standard defines the requirements for Internet host software (often by reference to the relevant RFCs). The standard comes in three parts: RFC1122 – Requirements for Internet hosts – communications layer, RFC1123 – Requirements for Internet hosts – application and support, and RFC 2181 – Clarifications to the DNS Specification. • STD 4 – Router Requirements This standard defines the requirements for IPv4 Internet gateway (router) software. It is defined in RFC 1812 – Requirements for IPv4 Routers.

Many applications over slow serial links tend to be single-user interactive TCP traffic, such as TELNET. This frequently involves small packet sizes and a relatively large overhead in TCP and IP headers that does not change much between datagrams, but which can have a noticeably detrimental effect on interactive response times. However, many SLIP implementations now use Van Jacobsen Header Compression. This is used to reduce the size of the combined IP and TCP headers from 40 bytes to 8 bytes by recording the states of a set of TCP connections at each end of the link and replacing the full headers with encoded updates for the normal case, where many of the fields are unchanged or are incremented by small amounts between successive IP datagrams for a session.

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