D-Link DSR-250N User Manual page 157

Unified Services Router
Point-to-Point Protocol over Ethernet. Protocol for connecting a network of hosts to an ISP
PPPoE
without the ISP having to manage the allocation of IP addresses.
Point-to-Point Tunneling Protocol. Protocol for creation of VPNs for the secure transfer of data
PPTP
from remote clients to private servers over the Internet.
Remote Authentication Dial-In User Service. Protocol for remote user authentication and
RADIUS
accounting. Provides centralized management of usernames and passwords.
RSA Rivest-Shamir-Adleman. Public key encryption algorithm.
Transmission Control Protocol. Protocol for transmitting data over the Internet with guaranteed
TCP
reliability and in-order delivery.
User Data Protocol. Protocol for transmitting data over the Internet quickly but with no
UDP
guarantee of reliability or in-order delivery.
Virtual private network. Network that enables IP traffic to travel securely over a public TCP/IP
VPN network by encrypting all traffic from one network to another. Uses tunneling to encrypt all
information at the IP level.
Windows Internet Name Service. Service for name resolution. Allows clients on different IP
WINS subnets to dynamically resolve addresses, register themselves, and browse the network without
sending broadcasts.
IKE Extended Authentication. Method, based on the IKE protocol, for authenticating not just
XAUTH devices (which IKE authenticates) but also users. User authentication is performed after device
authentication and before IPsec negotiation.
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