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Consider the topology in Figure 5. Assume that router 1d received the following prefix advertisement via IBGP [Prefix: 128.111.52.0/22; AS-PATH: AS3, AS131; NEXT- HOP: 169.111.69.2]. Answer the following questions. other networks 3c 3b 3a AS3 10 Sla AS1 110 1b 2a router port Figure 5: BGP example 20 AS2 2b other networks A. Which eBGP router in AS1 was the first to receive this advertisement? i. 1b ii. 1d iii. 1a iv. 1c B. It was likely that AS1 was running BGP as intra-domain routing protocol. True or False? i. True ii. False C. All routers in AS1 run IBGP. True or False? i. True ii. False

Consider the topology in Figure 5. Assume that router 1d received the following prefix advertisement via IBGP [Prefix: 128.111.52.0/22; AS-PATH: AS3, AS131; NEXT- HOP: 169.111.69.2]. Answer the following questions. other networks 3c 3b 3a AS3 10 Sla AS1 110 1b 2a router port Figure 5: BGP example 20 AS2 2b other networks A. Which eBGP router in AS1 was the first to receive this advertisement? i. 1b ii. 1d iii. 1a iv. 1c B. It was likely that AS1 was running BGP as intra-domain routing protocol. True or False? i. True ii. False C. All routers in AS1 run IBGP. True or False? i. True ii. False

Database System Concepts
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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Consider the topology in Figure 5. Assume that router 1d received the following prefix advertisement via iBGP [Prefix: 128.111.52.0/22; AS-PATH: AS3, AS131; NEXT- HOP: 169.111.69.2]. Answer the following questions. other networks 30 3b 3a AS3 $10 1a2 AS1 1103 1b 2a router port Figure 5: BGP example AS2 D. Only routers 1a and 1d in AS1 run eBGP. True or False? i. True ii. False i. [Prefix: 128.111.52.0/22; Port: 2] ii. [Prefix: 169.111.69.2; Port: 2] iii. [Prefix: 128.111.52.0/22; Port: 3] iv. [Prefix: 169.111.69.2; Port: 1] 2b A. Which eBGP router in AS1 was the first to receive this advertisement? i. 1b ii. 1d iii. 1a iv. 1c B. It was likely that AS1 was running BGP as intra-domain routing protocol. True or False? i. True ii. False C. All routers in AS1 run iBGP. True or False? i. True ii. False other networks E. What entry would this prefix generate in the forwarding table of router 1d, assuming that each link in AS1 has a fixed cost of 1?
Transcribed Image Text:Consider the topology in Figure 5. Assume that router 1d received the following prefix advertisement via iBGP [Prefix: 128.111.52.0/22; AS-PATH: AS3, AS131; NEXT- HOP: 169.111.69.2]. Answer the following questions. other networks 30 3b 3a AS3 $10 1a2 AS1 1103 1b 2a router port Figure 5: BGP example AS2 D. Only routers 1a and 1d in AS1 run eBGP. True or False? i. True ii. False i. [Prefix: 128.111.52.0/22; Port: 2] ii. [Prefix: 169.111.69.2; Port: 2] iii. [Prefix: 128.111.52.0/22; Port: 3] iv. [Prefix: 169.111.69.2; Port: 1] 2b A. Which eBGP router in AS1 was the first to receive this advertisement? i. 1b ii. 1d iii. 1a iv. 1c B. It was likely that AS1 was running BGP as intra-domain routing protocol. True or False? i. True ii. False C. All routers in AS1 run iBGP. True or False? i. True ii. False other networks E. What entry would this prefix generate in the forwarding table of router 1d, assuming that each link in AS1 has a fixed cost of 1?
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