Consider the network shown below. Suppose AS3 and AS2 are running OSPF for their intra- AS routing protocol. Suppose AS1 is running RIP for its intra-AS routing protocol. 1) Router 16 and 1c learns about prefix x from which routing protocol: OSPF, RIP, or inter- AS routing protocol? 2) Router la learns about prefix x from which routing protocol: OSPF, RIP, or inter-AS routing protocol? 3) Once router la learns that x is accessible via Ic as well as 1b, it will put an entry (x, 1) in its forwarding table. Will / be set to lī or 12? Explain why.

Consider the network shown below. Suppose AS3 and AS2 are running OSPF for their intra- AS routing protocol. Suppose AS1 is running RIP for its intra-AS routing protocol. 1) Router 16 and 1c learns about prefix x from which routing protocol: OSPF, RIP, or inter- AS routing protocol? 2) Router la learns about prefix x from which routing protocol: OSPF, RIP, or inter-AS routing protocol? 3) Once router la learns that x is accessible via Ic as well as 1b, it will put an entry (x, 1) in its forwarding table. Will / be set to lī or 12? Explain why.

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

Problem 1PE

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Question

Consider the network shown below. Suppose AS3 and AS2 are running OSPF for their intra-
AS routing protocol. Suppose AS1 is running RIP for its intra-AS routing protocol.
1) Router 16 and 1c learns about prefix x from which routing protocol: OSPF, RIP, or inter-
AS routing protocol?
2) Router la learns about prefix x from which routing protocol: OSPF, RIP, or inter-AS
routing protocol?
3) Once router la learns that x is accessible via le as well as 1b, it will put an entry (x, 1) in
its forwarding table. Will I be set to 11 or 12? Explain why.
3b
3c
3a
AS3
1a
12
1c
1d
AS1
1b
2a
AS2
2c
2b

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Suppose A is connected to B via an intermediate router R, as in the previous problem. The A-R link is instantaneous, but the R–B link transmits only one packet each second, one at a time (so two packets take 2 seconds). Assume A sends to B using the sliding window protocol with SWS = 4. For Time = 0, 1, 2, 3, 4, state what packets arrive at and are sent from A and B. How large does the queue at R grow?