Chapter 22
Network Layer:
Delivery, Forwarding,
and Routing
22.1
, 22-1 DELIVERY
The network layer supervises the handling of the
packets by the underlying physical networks. We
define this handling as the delivery of a packet.
Topics discussed in this section:
Direct Versus Indirect Delivery
22.2
, Figure 22.1 Direct and indirect delivery
22.3
, 22-2 FORWARDING
Forwarding means to place the packet in its route to
its destination. Forwarding requires a host or a router
to have a routing table. When a host has a packet to
send or when a router has received a packet to be
forwarded, it looks at this table to find the route to the
final destination.
Topics discussed in this section:
Forwarding Techniques
Forwarding Process
Routing Table
22.4
Network Layer:
Delivery, Forwarding,
and Routing
22.1
, 22-1 DELIVERY
The network layer supervises the handling of the
packets by the underlying physical networks. We
define this handling as the delivery of a packet.
Topics discussed in this section:
Direct Versus Indirect Delivery
22.2
, Figure 22.1 Direct and indirect delivery
22.3
, 22-2 FORWARDING
Forwarding means to place the packet in its route to
its destination. Forwarding requires a host or a router
to have a routing table. When a host has a packet to
send or when a router has received a packet to be
forwarded, it looks at this table to find the route to the
final destination.
Topics discussed in this section:
Forwarding Techniques
Forwarding Process
Routing Table
22.4
