Wireless Controller User Manual318Appendix A. GlossaryARP Address Resolution Protocol. Broadcast protocol for mapping IP addresses to MAC addresses.CHAP Challenge-Handshake Authentication Protocol. Protocol for authenticating users to an ISP.DDNS Dynamic DNS. System for updating domain names in real time. Allow s a domain name to beassigned to a device w ith a dynamic IP address.DHCP Dynamic Host Configuration Protocol. Protocol for allocating IP addresses dynamically so thataddresses can be reused w hen hosts no longer need them.DNSDomain Name System. Mechanism for translating H.323 IDs, URLs, or e-mail IDs into IPaddresses. Also used to assist in locating remote gatekeepers and to map IP addresses tohostnames of administrative domains.FQDN Fully qualified domain name. Complete domain name, including the host portion. Example:serverA.companyA.com.FTP File Transfer Protocol. Protocol for transferring files between network nodes.HTTP Hypertext Transfer Protocol. Protocol used by w eb browsers and web servers to transfer files.IKE Internet Key Exchange. Mode for securely exchanging encryption keys in ISAKMP as part ofbuilding a VPN tunnel.IPsecIP security. Suite of protocols for securing VPN tunnels by authenticating or encrypting IPpackets in a data stream. IPsec operates in either transport mode (encrypts payload but notpacket headers) or tunnel mode (encrypts both payload and packet headers).
