TCP Services

This section covers common TCP services or applications used in today's large IP networks:

  • Address Resolution Protocol (ARP)

  • Reverse Address Resolution Protocol (RARP)

  • Dynamic Host Configuration Protocol (DHCP)

  • Hot Standby Router Protocol (HSRP)

  • Internet Control Message Protocol (ICMP)

  • Telnet

  • File Transfer Protocol (FTP)

  • Trivial File Transfer Protocol (TFTP)

Address Resolution Protocol (ARP)

ARP determines a host's MAC address when the IP address is known. For example, to ping one device from another, the Layer 2 MAC fields require a destination MAC address. Because this is the first such request, a broadcast packet is sent across the wire to discover the remote host's MAC address. Figure 2-11 displays a scenario where PC1 wants to ping ...

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