D-Link DSR-500 User Manual page 143

Unified Services Router
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.
RSA Rivest-Shamir-Adleman. Public key encryption algorithm.
TCP Transmission Control Protocol. Protocol for transmitting data over the Internet with guaranteed
reliability and in-order delivery.
UDP User Data Protocol. Protocol for transmitting data over the Internet quickly but with no
guarantee of reliability or in-order delivery.
VPN Virtual private network. Network that enables IP traffic to travel securely over a public TCP/IP
network by encrypting all traffic from one network to another. Uses tunneling to encrypt all
information at the IP level.
WINS Windows Internet Name Service. Service for name resolution. Allows clients on different IP
subnets to dynamically resolve addresses, register themselves, and browse the network without
sending broadcasts.
XAUTH IKE Extended Authentication. Method, based on the IKE protocol, for authenticating not just
devices (which IKE authenticates) but also users. User authentication is performed after device
authentication and before IPSec negotiation.
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