-
The Routing and Remote Access Service (RRAS) supports RIP versions 1 and 2 as well as OSPF.
-
RIP routers maintain their routing tables by sending announcements to other RIP routers about the networks it can and cannot reach.
-
RIPv1 uses IP broadcast packets for its announcements.
-
RIPv2 uses IP multicast packets for its announcements.
-
RIP is typically used in networks with up to 50 routers, where no destination is farther than 14 hops away.
-
OSPF is a link-state protocol based on an algorithm that computes the shortest path between one host and other hosts .
-
OSPF is typically used in networks with more than 50 routers and with multiple redundant paths, where destinations might be farther than 14 hops away.
-
VPN supports Point-to-Point Tunneling Protocol (PPTP) and Layer Two Tunneling Protocol (L2TP) (with IPSec) for securing traffic.
-
PPTP tunnels use Microsoft Point-to-Point Encryption (MPPE) for encrypting traffic.
-
MPPE levels are 40-bit, 56-bit, or 128-bit encryption.
-
When you use IPSec in Tunnel mode, IPSec encrypts both the IP header and the payload.
-
IPSec in Tunnel mode protects the entire IP packet by treating it as an Authentication Header (AH) or Encapsulating Security Payload (ESP) payload.
-
When you use IPSec in Transport mode, IPSec encrypts only the payload.
-
Use the 80/20 or 50/50 rules for the fault-tolerant distribution of IP addresses from one scope so that more than one DHCP server can be used to service the same scope.
-
Windows Server 2003 DHCP Server service is a cluster-aware application.
-
In a centralized DHCP infrastructure, all DHCP functionality is managed on a few centrally located servers.
-
DHCP client reservations ensure that the DHCP server always assigns the same IP address to a host that uses the given scope.
-
The DHCP Routers option enables you to set the default gateway for all DHCP clients on a subnet.
-
You can manage DHCP client options by assigning different levels for each managed DHCP server. To do this, you can set options globally, at the scope level, and at the class level.
-
The DHCP service on each server must be authorized in Active Directory.
-
When a DHCP client wants to request an IP address from a DHCP server, it sends out a DHCPDISCOVER request.
-
When a DHCP server receives a DHCP client request (DHCPDISCOVER), it responds by sending a DHCPOFFER response.
-
When a DHCP client receives a response (DHCPOFFER) from the DHCP server(s), it sends back a DHCPREQUEST message to the DHCP server.
-
The DHCP server responds to DHCPREQUEST messages from DHCP clients with an DHCPACK message, acknowledging that it received the reply and acceptance of the IP address.
-
When the DHCP service is running, each DHCP server requests access to the authorized server list when it first starts up; after that, access requests are sent every minutes for authorized servers and every 10 minutes for unauthorized servers.
-
The DHCP Audit log can be used to review critical events and errors.
