46
Chapter 1
The Campus Network
Answers to Lab 1.2
Answers to Lab 1.3
1.
A layer 3 device, usually a router. Layer 2 devices do not break up
broadcast domains.
2.
A layer 2 device, typically a switch. Although routers break up both
collision domains and broadcast domains, layer 2 switches are prima-
rily used to break up collision domains.
3.
Segment, packet, frame, bits. It is important to understand the ques-
tion. This question asked for the encapsulation methods, which means
how data is encapsulated as user data goes from the Application layer
down to the Physical layer.
4.
The core layer should have no packet manipulation, if
possible.
5.
Port or socket. TCP uses port numbers. IPX uses sockets.
6.
A packet or datagram is the PDU used at the Network layer.
7.
Access layer. Remember, the distribution layer is used to break up
broadcast domains and the access layer is used to break up collision
domains.
Definition
Layer
Routes traffic between VLANs
2
Uses collision domains
1
Uses broadcast domains
2
Uses access lists
2
Provides end users with access to the network
1
Communicates between the switch blocks and to the enterprise
servers
3
Switches traffic as quickly as possible
3
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