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Network Protocols TCP/IP • TCP - Transmission Control Protocol • IP - Internet Protocol Application Layer Protocols to KNOW • • • • • • • • • • • • DHCP – Dynamic Host Core Protocol DNS – Domain Name System FTP – File Transfer Protocol HTTP – Hyper Text Transfer Protocol S-HTTP – Secure Hypter Text Transfer Protocol IMAP / IMAP4 – Internet Message Access Protocol (version 4) LDAP – Lightweight Directory Access Protocol NAT – Network Address Translation NTP – Network Time Protocol POP / POP3 – Post Office Protocol (version 3) SMTP – Simple Mail Transfer Protocol URL – Uniform Resource Locator Transport Layer Protocol to KNOW • TCP – Transmission Core Protocol • UDP – User Datagram Protocol Network Layer Protocols to KNOW • Routing Protocols • OSPF – Open Shortest Path First Protocol • RIP – Routing Information Protocol Data Link Layer Protocol • ARP – Address Resolution Protocol • RARP – Reverse ARP Security Protocols • Kerberos • RADIUS • SSH • Tunneling • L2F • L2TP • PPTP • Secured Routing Protocol • IPSec • TLS Wide Area Network Protocols • ATM • ISDN • xDSL • DOCSIS • Frame Relay Local Area Network Protocols • Ethernet • VLAN • Wireless • FDDI - Fiber Ethernet Architecture • Physical Topologies • Bus (Early days – not used anymore) • Star • Logical Topologies • Bus (Hub) • Star (Switch) • Media • Copper (Coax, UTP, STP) • Fiber Optic Devices • NICs • Hubs • Switches • Routers Media Access • When is it okay to transmit? • CSMA/CD (physical or logical bus) • Carrier Sense Multiple Access / Collision Detection • What happens if two computers want to send at same time? • Collision (overlapping signal) • Jam signal • Back off (random time) Switch • No longer needs collision detection • Speeds up network Duplex • Half (hub) • Slows down because of CS and CD • Full (switch) • doubles bandwidth Specs Category Standard Bandwidth Cable Type Max Length Ethernet 10BaseT 10 Mbps Twisted Pair 100 meters 10BaseFL 10 Mbps Fiber 1000 – 2000 m 100BaseTX 100 Mbps Twisted Pair 100 meters 100BaseFX 100 Mbps Fiber 412 meters 1000BaseT 1000 Mbps Twisted Pair 100 meters 1000BaseCX 1000 Mbps Copper 25 meters 1000BaseSX 1000 Mbps Fiber 220-550 meters 1000BaseLX 1000 Mbps Fiber 5 kilometers 10GBaseT 10 Gbps Twisted Pair 100 meters 10GBaseSR 10 Gbps Multi Fiber 300 meters 10GBaseLR 10 Gbps Single Fiber 10 kilos 10GBaseER 10 Gbps Single Fiber 40 kilos Fast Ethernet Gigabit Ethernet 10 Gigabit Ethernet
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