NET 413 HW 2

NET 413
HW 2
Due Sunday, January 31, 2021 by 11:59 pm
50 pointsName:Submit your answers to the following questions on D2L. Include your name at the beginning of your answer file.1. (10 points total) Refer to the following diagram, where a switch with ports 1 to 24 is connected to devices with MAC addresses A to H.Assume that the forwarding table is initially empty and that the following sequence of transmissions occurs (each is a one-way frame transmission and there is no timeout of Forwarding Table entries during this time):
[1] Device A transmits a frame to device E
[2] Device E transmits a frame to device A
[3] Device D transmits a frame to device G
[4] Device E transmits a frame to device H
[5] Device G transmits a frame to device D
[6] Device H transmits a frame to device Ea. (6 pts) For each frame transmission, list all switch port(s) on which the frame is sent out. Note: this will never include the port on which the switch receives the frame. You should do these in order (from [1] to [5]) and keep track of how the Forwarding Table changes with each frame transmission. For example, the Forwarding Table is empty when frame [1] is received, but then the Forwarding Table is updated from frame [1], so it is not empty when frame [2] is received, then it is updated from frame [2] before frame [3] is received, etc. The contents of your forwarding table will be entered in part b.
i.
ii.
iii.
iv.
v.
vi.b. (4 pts) Show the contents of the Forwarding Table after all six frame transmissions have completed. Each line of the Forwarding Table will have a MAC Address (A thru H) and a Port (1 thru 8).
MAC Address (A-H) Port (1-8)2. (5 points) Explain an advantage of Router-on-a-Stick Inter-VLAN Routing as compared with Legacy Inter-VLAN Routing.3. (35 points total) Consider this switched network. Assume that STP is running on this network. Fa interfaces run at 100 Mbps and G interfaces run at 1 Gbps. The table below shows the Bridge ID (BID) value for each switch, split into Priority and MAC Address parts. All ports are on VLAN 1. Assume that all links have default costs.a. (5 points) When STP protocol executes, which switch (S1, S2 or S3) will become the Root Switch for this network? Why?b. (8 points) Give the Port Role for each of the following ports, i.e., one of {Root, Designated, Backup}.
i. S1 Fa0/1
ii. S1 G0/2
iii. S1 Fa0/2
iv. S2 Fa0/1
v. S2 G0/2
vi. S2 Fa0/2
vii. S3 G0/1
viii. S3 G0/2c. (4 points) Which ports in this network will be placed into the Blocking State (also called the Discarding State in RSTP)?d. (5 points) What is the Root Path Cost for switch S2? In other words, what is the Path Cost from S2 to the Root Switch?e. Assume that the Host MAC address is 11:22:33:44:55:66. After STP has executed, the Host sends out a broadcast, so that its MAC address is added to the Forwarding Table on each of the 3 switches.
i. (4 points) What is the port associated with 11:22:33:44:55:66 in the S2 Forwarding Table?
Switch S2 Forwarding Table
MAC Address Port
11:22:33:44:55:66 ??ii. (4 points) What is the port associated with 11:22:33:44:55:66 in the S3 Forwarding Table?
Switch S3 Forwarding Table
MAC Address Port
11:22:33:44:55:66 ??f. (5 points) Suppose you want Switch S2 to become the new Root Switch. What command could you type on the Switch S2 CLI to make this happen?
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