Ip Address

1214
Inserting Records into the DNS Database
Inserting Records into the DNS Database

The discussion in the last article focused on how records are retrieved from the DNS database. You might be wondering how records get into the database in the first place. Let's see how this is done in the context of a particular example. Assume you have just created an exciting

Tags dns database, registrar, dns server, ip address, ip datagrams
1168
Internet Control Message Protocol (ICMP)
Internet Control Message Protocol (ICMP)

Remember that the network layer of the Internet has three main components: the IP protocol, discussed in the previous section; the Internet routing protocols (including RIP, OSPF. and BGP), which are covered in Routing in the Internet and ICMP, which is the subject of this section.

Tags network layer, router, host, icmp, source quench message, ip protocol, ip address
1229
IPv6
IPv6

In the early 1990s, the Internet Engineering Task Force began an effort to develop a successor to the IPv4 protocol. A prime motivation for this effort was the realization that the 32-bit IP address space was beginning to be used up, with new subnets and IP nodes being attached to

Tags ip address, subnet, anycast address, ip nodes
2293
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
1217
MAC Addresses
MAC Addresses

Because there are both network-layer addresses (for instance, Internet IP addresses) and link-layer addresses (that is, MAC addresses), there is a need to translate between them. For the Internet, this is the job of the Address Resolution Protocol (ARP).

Tags network layer, nodes, router, ip address, datagram
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