Homework #2 Q1: A set of LANS are linked using bridges to create the bridged network depicted by the figure bellow. The bridges communicate configuration BPDUS to build a spanning tree to prevent loops within the network. If all bridges start the spanning tree algorithm (all bridges are initialized), answer the following questions (assume that the circles in the figure are the bridges and the ID for each bridge is the number inside these circles. Also assume that the state of each bridge is changing in sequence according to the information in each question) B3 B5 B1 B2 F E 87 H B6 B4 a) What is the initial configuration BPDU for B6? b) What is the configuration BPDU of B2 after receiving the initial configuration BPDU of B7? c) If B3 accepted B2 as the root, what is the configuration BPDU of B3? d) If B3 accepted B1 as the root through B5, what is the configuration BPDU of B3? e) Which bridge is the designated bridge of LAN C at this time? f) Now, if B7 accepted B1 as the root, what is the configuration BPDU of B2 after receiving the new configuration BPDU of B7? g) Which bridge is the designated bridge of LAN C at this time?

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Homework #2
Q1: A set of LANS are linked using bridges to create the bridged network depicted by the figure
bellow. The bridges communicate configuration BPDUS to build a spanning tree to prevent
loops within the network. If all bridges start the spanning tree algorithm (all bridges are
initialized), answer the following questions (assume that the circles in the figure are the
bridges and the ID for each bridge is the number inside these circles. Also assume that the
state of each bridge is changing in sequence according to the information in each question)
B3
B5
B1
B2
F
B7
B6
B4
a) What is the initial configuration BPDU for B6?
b) What is the configuration BPDU of B2 after receiving the initial configuration BPDU of
B7?
c) If B3 accepted B2 as the root, what is the configuration BPDU of B3?
d) If B3 accepted B1 as the root through B5, what is the configuration BPDU of B3?
e) Which bridge is the designated bridge of LAN C at this time?
f) Now, if B7 accepted B1 as the root, what is the configuration BPDU of B2 after receiving
the new configuration BPDU of B7?
g) Which bridge is the designated bridge of LAN C at this time?
Transcribed Image Text:Homework #2 Q1: A set of LANS are linked using bridges to create the bridged network depicted by the figure bellow. The bridges communicate configuration BPDUS to build a spanning tree to prevent loops within the network. If all bridges start the spanning tree algorithm (all bridges are initialized), answer the following questions (assume that the circles in the figure are the bridges and the ID for each bridge is the number inside these circles. Also assume that the state of each bridge is changing in sequence according to the information in each question) B3 B5 B1 B2 F B7 B6 B4 a) What is the initial configuration BPDU for B6? b) What is the configuration BPDU of B2 after receiving the initial configuration BPDU of B7? c) If B3 accepted B2 as the root, what is the configuration BPDU of B3? d) If B3 accepted B1 as the root through B5, what is the configuration BPDU of B3? e) Which bridge is the designated bridge of LAN C at this time? f) Now, if B7 accepted B1 as the root, what is the configuration BPDU of B2 after receiving the new configuration BPDU of B7? g) Which bridge is the designated bridge of LAN C at this time?
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