Internetworking: Technological Foundations and Applications by Christoph Meinel

By Christoph Meinel

This e-book is meant to function a entire and instructive advisor during the new global of electronic verbal exchange. at the actual layer optical and electric cabling know-how are defined in addition to instant conversation applied sciences. at the information hyperlink layer neighborhood region networks (LANs) are brought including the most well-liked LAN applied sciences similar to Ethernet, Token Ring, FDDI, and ATM in addition to instant LAN applied sciences together with IEEE 802.x, Bluetooth, or ZigBee. quite a lot of WAN applied sciences are coated together with modern excessive velocity applied sciences like PDH and SDH as much as excessive pace instant WANs (WiMAX) and 4th new release instant mobile networks LTE. Routing applied sciences finish the therapy of the knowledge hyperlink layer. subsequent, there's the web layer with the net protocol IP that establishes a digital uniform community out of the web of heterogeneous networks. intimately, either types, IPv4 in addition to the successor IPv6 are lined intimately in addition to ICMP, NDP, and cellular IP. within the next shipping layer protocol services are supplied to provide a connection-oriented and trustworthy shipping provider at the foundation of the easy and unreliable IP. the elemental protocols TCP and UDP are brought in addition to NAT, the community tackle translation. Beside delivery layer protection protocols like SSL and TLS are awarded. at the upmost program layer well known web program protocols are defined like DNS, SMTP, PGP, (S)FTP, NFS, SSH, DHCP, SNMP, RTP, RTCP, RTSP, and worldwide Web.

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It has, however, never gone through the prescribed standardization process. This kind of standard has been principally deemed to be of little interest for practical application. , replaced by a new standard. As every Internet standard can suffer this fate, RFCs are periodically released to 22 1 Prologue provide a better overview of the current standards. These are listed there officially. Along with the level of a RFCs, the IAB determines a standard a level of significance (Protocol Status) for every protocol released.

Residual data is forwarded based on the information in header k. Layer k Interface to layer k-1 k k-1 ... ,1 with command and control information Fig. 4 Every layer of the protocol stack reads the data received in the layer-relevant header with the command and control information necessary for processing at this layer. The actual communication in the protocol stack is always carried out in a vertical direction. When sending data, each protocol layer adds its own command and control information to this data.

The protocols acting on different layers are interlocked via the interface and together form a family of communication protocols (protocol family, protocol suite). The user, but also the majority of application programs communicating over the network to exchange data and offer services, only come into contact with this network operating system. It is only an extremely rare case that contact occurs with the network hardware hidden underneath. 1 Protocol Families All of the parties involved must agree to follow common, fixed rules concerning the exchange of information to enable communication – and that not only in the case of digital communication in computer networks.

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