The CTDP Networking section Comprehensive networking documentation is provided with two networking documents. Categorized networking links are included.
ITtoolbox Portal for Networking A networking community for IT professionals. Focusing on connectivity, network management, network operating systems, security, and other aspects of networking.
Wikipedia Links
MTU (Networking) The Maximum Transmission Unit (MTU) is a term for the size (in bytes) of the largest datagram that can be passed by a layer of a communications protocol. In the Internet Protocol the "path MTU" of an Internet transmission path is defined to be the smallest MTU of any of the IP hops.
The Internet Protocol allows IP fragmentation so that a datagram can be fragmented into pieces small enough to pass over a link with a smaller MTU than the original datagram size.
Node (Networking) A node is a device that is connected as part of a computer network. Nodes can be computers, personal digital assistants (PDAs), cell phones, or various other network appliances.
On an IP (Internet Protocol) network, a node is any device with an IP address.
Nodes are often times connected by Ethernet hubs, routers, or by a network switch.
Firewall (Networking) In computing, a firewall is a piece of hardware and/or software which functions in a networked environment to prevent some communications forbidden by the security policy, analogous to the function of firewalls in building construction.