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DWC-1000 Wireless Controller User’s Guide
APPENDIX C. GLOSSARY
Term Definition
Access point A device that provides network access to wireless devices.
ARP 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. Allows a domain name to be
assigned to a device with a dynamic IP address.
DHCP
Dynamic Host Configuration Protocol. Protocol for allocating IP addresses dynamically so that
addresses can be reused when hosts no longer need them.
DNS
Domain Name System. A hierarchical distributed naming system for computers, services, or any
resource connected to the Internet or a private network.
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 web browsers and web servers to transfer files.
IKE
Internet Key Exchange. Mode for securely exchanging encryption keys in ISAKMP as part of building
a VPN tunnel.
IPsec
IP security. Suite of protocols for securing VPN tunnels by authenticating or encrypting IP packets in
a data stream. IPsec operates in either transport mode (encrypts payload but not packet headers) or
tunnel mode (encrypts both payload and packet headers).
ISAKMP
Internet Key Exchange Security Protocol. Protocol for establishing security associations and
cryptographic keys on the Internet.
ISP Internet service provider.
MAC Address Media-access-control address. Unique physical-address identifier attached to a network adapter.
MTU
Maximum transmission unit. Size, in bytes, of the largest packet that can be passed on. The MTU for
Ethernet is a 1500-byte packet.
NAT
Network Address Translation. Process of rewriting IP addresses as a packet passes through a
controller or firewall. NAT enables multiple hosts on a LAN to access the Internet using the single
public IP address of the LAN’s gateway controller.
NetBIOS
Microsoft Windows protocol for file sharing, printer sharing, messaging, authentication, and name
resolution.
NTP
Network Time Protocol. Protocol for synchronizing a controller to a single clock on the network,
known as the clock master.
PAP
Password Authentication Protocol. Protocol for authenticating users to a remote access server or
ISP.
PPPoE
Point-to-Point Protocol over Ethernet. Protocol for connecting a network of hosts to an ISP without
the ISP having to manage the allocation of IP addresses.
PPTP
Point-to-Point Tunneling Protocol. Protocol for creation of VPNs for the secure transfer of data from
remote clients to private servers over the Internet.
RADIUS
Remote Authentication Dial-In User Service. Protocol for remote user authentication and accounting.
Provides centralized management of usernames and passwords.
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