Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Network transmission cabling
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Can someone please help me with problem 3.5.7? I'll give a thumb up to thank for your time.
As I'm reviewing for my upcoming exam, I really need an answer from an expert in the field. 
Please do not send me an answer from chatGPT. I've got enough of that, so please be helpful. Thank you.

 

N1 192.168.1.0 N2 192.168.2.0 R1 R2 N4 192.168.4.0 192.168.4.1 192.168.4.2 192.168.3.0 N3 Area 0 192.168.4.4 192.168.4.3 R4 192.168.3.1 R3 N5 192.168.5.0 192.168.5.1 192.168.5.7 R5 Area 1 N6 192.168.6.0 192.168.6.3 This example has a number of additional features. First, there are two areas, area 0 and area 1. Secondly, there are a number of broadcast subnetworks (just imagine these as plain Ethernet networks), N1 to N6, and multiple routers are attached to two of these (N4 and N5). For subnetworks N4 and N5 router R4 is the designated router (DR). These broadcast subnetworks all have distinct /24 network addresses. In OSPF terminology, subnet- works N1, N2, N3 and N6 are stub networks, to which only one OSPF router is attached, and furthermore all packets a stub network handles either originate in it or are destined to it, and no other packets pass through. In contrast, subnetworks N4 and N5 are called transit networks. Note furthermore that router R4 is an area- border router. All routers choose their router id as the highest IP address of any of its interfaces. For simplicity, all link weights are one. Note that the IP address of R1 on N1 and of R2 on N2 are immaterial. Furthermore, no address aggregation is applied, and no default routers are being used. Problem 3.5.7 (What is in the link-state database). Which router, network and summary LSAs are contained in the link-state database for area 0? Same question for area 1. For the summary LSAs you can assume that no address aggregation is used.
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Transcribed Image Text:N1 192.168.1.0 N2 192.168.2.0 R1 R2 N4 192.168.4.0 192.168.4.1 192.168.4.2 192.168.3.0 N3 Area 0 192.168.4.4 192.168.4.3 R4 192.168.3.1 R3 N5 192.168.5.0 192.168.5.1 192.168.5.7 R5 Area 1 N6 192.168.6.0 192.168.6.3 This example has a number of additional features. First, there are two areas, area 0 and area 1. Secondly, there are a number of broadcast subnetworks (just imagine these as plain Ethernet networks), N1 to N6, and multiple routers are attached to two of these (N4 and N5). For subnetworks N4 and N5 router R4 is the designated router (DR). These broadcast subnetworks all have distinct /24 network addresses. In OSPF terminology, subnet- works N1, N2, N3 and N6 are stub networks, to which only one OSPF router is attached, and furthermore all packets a stub network handles either originate in it or are destined to it, and no other packets pass through. In contrast, subnetworks N4 and N5 are called transit networks. Note furthermore that router R4 is an area- border router. All routers choose their router id as the highest IP address of any of its interfaces. For simplicity, all link weights are one. Note that the IP address of R1 on N1 and of R2 on N2 are immaterial. Furthermore, no address aggregation is applied, and no default routers are being used. Problem 3.5.7 (What is in the link-state database). Which router, network and summary LSAs are contained in the link-state database for area 0? Same question for area 1. For the summary LSAs you can assume that no address aggregation is used.
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