Hosts

766
A Brief Foray into IP Security
A Brief Foray into IP Security

"Internet Control Message Protocol (ICMP)" covered IPv4 in some detail, containing the services it provides and how those services are implemented. While reading through that section, you may have noticed that there was no mention of any security services. In fact, IPv4 was

Tags computer network, virtual private networks, routers, hosts, cryptographic algorithms
2306
Link-Layer Addressing
Link-Layer Addressing

Nodes that is hosts and routers have link-layer addresses. Now you might find this surprising, recalling from "The Network Layer" that nodes have network-layer addresses as well. You might be thinking, why in the world do we need to have addresses at both the network and link

Tags nodes, protocol stack, network layer, routers, hosts, ip address
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