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CCNA Routing and Switching Lesson 03 - TCP & IP - Eric Vanderburg
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CCNA Routing and Switching Lesson 03 - TCP & IP - Eric Vanderburg

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CCNA Routing and Switching Lesson 03 - TCP & IP - Eric Vanderburg

CCNA Routing and Switching Lesson 03 - TCP & IP - Eric Vanderburg

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  • 1. TCP/IP & IP Addressing Chapter 3 Networking Essentials – Eric Vanderburg © 2005
  • 2. TCP/IP Origin  Created by the DoD (Department of Defense) ARPA (Advanced Research Projects Agency) in order to have a network that could survive a nuclear attack.
  • 3. Protocol Suite FTP (File Transfer Protocol)  TFTP (Trivial File Transfer Protocol)  NFS (Network File System) – network sharing  SMTP (Simple Mail Transfer Protocol)  Telnet (Terminal Emulation Protocol)  SNMP (Simple Network Management Protocol)  DNS (Domain Name System) 
  • 4. Protocol Suite        HTTP (Hypertext Transfer Protocol) NTP (Network Time Protocol) POP (Post Office Protocol) NNTP (Network News Transfer Protocol) ARP (Address Resolution Protocol) – Find MAC from IP RARP (Reverse Address Resolution Protocol) – MAC to IP for diskless workstations ICMP (Internet Control Message Protocol)
  • 5. Ports           20, 21 FTP 23 Telnet 25 SMTP UDP 53 DNS 69 TFTP 80 HTTP 123 NTP 110 POP3 119 NNTP 161 SNMP
  • 6. Handshakes A: SYN connection request is sent  B: ACK to SYN with sequence + 1 and sends own SYN  A: ACK to B’s SYN with sequence + 1 
  • 7. Subnetting Find Hosts & Subnets from a given subnet mask  Find the subnet mask for a required number of hosts or subnets  Determine which network a host is on.  Determine the broadcast address for the network a host belongs to.  CIDR Notation (ex: /24 ) 
  • 8. VLSM (Variable Length Subnet Masks) Essentially subnets the subnets  Not supported by some routing protocols such as RIP and IGRP  Start with the largest and work your way down 
  • 9. Summarization Routers that know about a number of addresses can summarize them by advertising a larger range instead of many smaller ranges.  Only works when the router knows about all networks in a range 
  • 10. Remote Hosts Client contacts default gateway  Default gateway recreates the data with a new IP header and sends it off  Receiving router APRs the host to get its MAC and creates a new frame to send to it. 
  • 11. Hexidecimal  Hex numbers convert to 4 bits. (1 nibble)
  • 12. Acronyms            ARP, Address Resolution Protocol CIDR, Classless Inter-Domain Routing DNS, Domain Name System FTP, File Transfer Protocol ISN, Initial Sequence Number ICMP, Internet Control Message Protocol TCP, Transmission Control Protocol TTL, Time To Live TFTP, Trivial File Transfer Protocol UDP, User Datagram Protocol VLSM, Variable Length Subnet Masking

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