Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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2. The ISP that owns all these networks is short on IP addresses, so they use a NAT router for R2. How many public IP addresses will C and D use together assuming they use as many private 10.X IP addresses as they can? How many total public IP addresses will be used by the entire network? Why doesn’t the ISP care about how many private IP addresses are used?
Transcribed Image Text:A
B
L2
L1
R1 K
L3
R3
L4
Default
45
Link
L4
L3
L5
R2
0.0.0.0/0
128.4.6.0/24
128.4.8.0/24
15. If 128.4.6.0 is in A, what is the routing table at R1?
L7
A,B,C and D are subnets, R1, R2, and R3 are routers. Default signifies the
entire rest of the internet. All 4 subnets each contain the same number of hosts.
Consider the following routing table at R3:
CIDR Mask
L6
с
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- Find out how many IPv4 addresses are available in total. As a result of NAT, IPv4 addresses have been given more time to mature (NAT). Must IPv6 be universally implemented? Is IPv6 essential for the operation of a cutting-edge system?arrow_forwardQuestion 10 Consider the network shown below. The IP and MAC addresses are shown for hosts A, B, C and D, as well as for the router's interfaces. Consider an IP datagram being sent from node B to node D. 77-34-F1-EF-14-72 128,119,97,18 (1) 68-01-BC-58-AF-24 128,119,50,107 B (3) 49-FA-B0-3C-E2-7C 128,119,50.00 72-9E-4A-31-9C-42 128.119.240.15 CC-A5-81-08-AE-33 128,119,97,194 40-00-00-74-06-1F 128,119,240,52 (6) C D5-A0-EE-90-73-05 128,119,240.116 A. What is the source/destination network- or link-layer address at the location (3)? B. What is the source/destination network- or link-layer address at the location (4)? C. What is the source/destination network- or link-layer address at the location (5)? Consider an IP datagram being sent from node A to node C. D. What is the source/destination network- or link-layer address at the location (2)? E. What is the source/destination network- or link-layer address at the location (4)? F. What is the source/destination network- or link-layer…arrow_forwardSuppose there are two ISPS providing WiFi access in a particular café, with each ISP operating its own AP and having its own IP address block. A. Further suppose that by accident, each ISP has configured its AP to operate over channel 11. Will the 802.11 protocol completely break down in this situation? Discuss what happens when two stations, each associated with a different ISP, attempt to transmit at the same time. B. Now suppose that one AP operates over channel 1 and the other over channel 11. How do your answers change?arrow_forward
- An IP address can be written as a 32-bit number. For a class B network, the two most significant bits are set to 10. The 16 most significant bits are used as a network ID, and the 16 least significant bits are used as a host ID. However, the host ID cannot be all O's or all 1's. How many hosts (i.e., host IDs) can there be on a class B network? Type your answer.arrow_forwardHow to forward to a border router? Consider the network shown below. Suppose AS1, AS2, AS3, and AS4 are running OSPF for their intra-AS routing protocol and that all links have a weight of 1. Initially suppose there is no link between AS2 and AS4. Once router 1d learns about destination x, it will need to install a forwarding table entry to x. Indicate which one of the statements below are true. 3b 3a AS 3 4c 1a 4b AS 4 1c AS 1 1d 4a 1b 2c AS 2 2b O 1d will forward along z1 since OSPF has computed the path to 1c is via z1. O 1d will forward along z2 since BGP has computed the path to 1c is via z2. O 1d will forward along z2 since OSPF has computed the path to 1c is via z2. O 1d will forward along z1 since BGP has computed the path to 1c is via z1. O 1d will forward along z1 since hot potato routing forwards clockwise.arrow_forwarddont dont dont post eixsting one sure sure compliant skip only answer if 100% sure else compliantarrow_forward
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