Router

1136
Output Ports
Output Ports

Output port processing, shown in Switching Fabric Figure 2, takes the packets that have been stored in the output ports memory and transmits them over the outgoing link. The data link protocol processing and line termination are the send-side link- and physical-layer

Tags switch fabric, packet loss, router, traffic load, packet scheduler
1441
IP Datagram Fragmentation
IP Datagram Fragmentation

Well study in "The Link Layer and Local Area Networks" that not all link-layer protocols can carry network-layer packets of the same size. Some protocols can carry big datagrams, whereas other protocols can carry only little packets. For instance, Ethernet frames can carry up to

Tags maximum transmission unit, router, forwarding table, fragment, transport layer, ip datagram
1103
Network Address Translation (NAT)
Network Address Translation (NAT)

After studying Internet addresses and the IPv4 datagram format, we're now well aware that every IP-capable device requires an IP address. With the proliferation of small office, home office (SOHO) subnets, this would seem to imply that whenever a SOHO wants to install a LAN to

Tags subnet, address space, router, connection reversal, nat traversal
1165
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
1213
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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