124 Chapter 3: OSI Reference Model & Layered Communication
Scenario Answers
Answers to Task 1 for Scenario 3-1
Based on the network design illustrated in Figure 3-22, Task 1 for Scenario 3-1 asks you to
create the routing table in Router A; assume that all parts of the network are up and working
properly. The routing table for Router A is as follows:
Answers to Task 2 for Scenario 3-1
Based on the network design illustrated in Figure 3-22, Task 2 for Scenario 3-1 states that
D'Artagnan sends a packet to Aramis (source group-1.local-M, destination group-4.local-M).
D'Artagnan sends this packet inside an Ethernet frame to Router A. The following are the
solutions to exercises 1 through 4 for Task 2.
1
The routing tables are as follows:
In Router A:
In Router B:
Group
Outgoing Interface
Next Router
group-1
Ethernet 0
--
group-2
serial 0
--
group-3
serial 0
group-2.local-B
group-4
serial 0
group-2.local-B
group-5
serial 1
--
group-6
serial 1
group-5.local-D
group-7
serial 1
group-5.local-E
Group
Outgoing Interface
Next Router
group-2
serial 0
--
group-4
serial 0
group-2.local-B
Group
Outgoing Interface
Next Router
group-3
Ethernet 0
--
group-4
Ethernet 0
group-3.local-C
ch03.fm Page 124 Monday, March 20, 2000 4:58 PM