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2024-08-24 15:13本頁(yè)面
【正文】 binations can be achieved. 來(lái)自 What is a Sub? (4) After Sub Network ID Sub Mask Host Range ………… …………. TOTAL 254 SUBNETS 254 HOSTS PER SUBNET 來(lái)自 Why Subting? ? Reduced work traffic – ? smaller the work smaller the broadcast domains and less work traffic on that work segment ? Optimized work performance – ? result of reduced work traffic ? Simplified management – ? easier to identify and isolate work problems in a smaller group ? Facilitated spanning of large geographical distances – ? since WAN links are considerably slower and more expensive。來(lái)自 Inter Protocol 來(lái)自 Overview TCP/IP and the DoD Model IP Addressing Subting 來(lái)自 TCP/IP and the DoD Model Comparison of Dod and OSI Model The TCP/IP protocol suite The Process / Application layer Protocols The HosttoHost Layer Protocols The Inter Layer Protocols 來(lái)自 Comparison of DoD and OSI Model (1) ? The TCP/IP suite was created by the DoD ? The DoD model is a condensed version of the OSI model Application Presentation Session Transport Network Data Link Physical Process / Application HosttoHost Inter Network Access DoD Model OSI Model ? Nodetonode application munication ? Controls userinterface specifications ? Setting up the level of transmission service for applications ? Takes care IP address and designate protocols for logical transmission of packets over the entire work ? Oversees hardware addressing and defines protocols for the physical transmission of data 來(lái)自 Comparison of DoD and OSI Model (2) TCP/IP Model OSI Model 來(lái)自 The TCP/IP Protocol Suite Process / Application Tel TCP UDP IP ICMP ARP LAN Technologies: Ether, Fast Ether, Token Ring, FDDI WAN Technologies: Serial Lines, Frame Relay, ATM RARP HosttoHost Inter Network Access FTP TFTP SMTP LPD SNMP NFS X Window BootP/ DHCP DNS IGMP 來(lái)自 The Process / Application Layer Protocols ? Tel – Telephone Network ? FTP – File Transfer Protocol ? TFTP – Trivial File Transfer Protocol ? NFS – Network File System ? SMTP – Simple Mail Transfer Protocol ? LPD – Line Printer Daemon ? X Window – writing a GUIbased client/server applications ? DNS – Domain Name Service (DNS) ? BootP – Bootstrap Protocol ? DHCP – Dynamic Host Configuration Protocol 來(lái)自 The HosttoHost Layer Protocols ? To shield the upperlayer applications from the plexities of the work ? TCP (Transmission Control Protocol) ? Break down data from upper layers into Segment ? Numbers and sequences each segment ? Connectionoriented – virtual circuit required ? User Datagram Protocol (UDP) ? Break down data but not sequence the segment ? Thin protocol which doesn’t take up
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