The following information was obtained from a host with an IP address of 205.133
ID: 641117 • Letter: T
Question
The following information was obtained from a host with an IP address of 205.133.127.8 subnet mask 255.255.255.0 and a default gateway of 205.133.127.1:
*Note: all addresses between 205.133.127.0 and 205.133.127.255 are on the same LAN
C:>ping foxnews.com
Pinging 96.17.202.208 with 32 bytes of data:
Reply from 96.17.202.208: bytes=32 time<10ms TTL=255
Reply from 96.17.202.208: bytes=32 time<10ms TTL=255
Reply from 96.17.202.208: bytes=32 time<10ms TTL=255
C:>ARP -a
Internet Address
Physical Address
205.133.127.1
00-50-54-7b-e8-c0
205.133.127.4
00-10-1f-52-10-00
205.133.127.8
00-60-08-93-38-c2
205.133.127.9
00-60-08-93-38-db
205.133.127.12
00-50-04-c3-c1-95
205.133.127.14
00-c0-f0-12-ad-59
205.133.127.16
00-10-4b-c9-61-37
205.133.127.17
00-50-da-11-f7-5f
205.133.127.30
0-50-da-0b-ff-4b
205.133.127.34
00-50-04-01-89-39
205.133.127.255
ff-ff-ff-ff-ff-ff
205.133.127.39
00-a0-4b-05-21-c8
205.133.127.47
00-c0-05-01-4e-4b
205.133.127.53
00-c0-05-04-39-2a
205.133.127.76
08-00-20-0b-6d-b9
205.133.127.84
00-c0-05-04-14-17
205.133.127.85
00-c0-05-04-1e-19
205.133.127.86
00-c0-05-04-39-2a
205.133.127.88
00-c0-05-04-5b-c9
205.133.127.101
00-c0-05-04-39-2a
205.133.127.110
00-c0-05-04-14-17
205.133.127.116
00-80-5f-e4-f1-46
205.133.127.158
00-c0-05-04-39-2a
205.133.127.234
00-40-33-ca-a1-5d
205.133.127.238
00-60-97-79-2-8a
a)Describe the sequence of events (in detail) that would occur if this host then had packets destined for:
1)205.133.127.86
2)205.133.127.87
3)96.17.202.208
b)What is the significance of the entry for 205.133.127.255
C:>ARP -a
Internet Address
Physical Address
205.133.127.1
00-50-54-7b-e8-c0
205.133.127.4
00-10-1f-52-10-00
205.133.127.8
00-60-08-93-38-c2
205.133.127.9
00-60-08-93-38-db
205.133.127.12
00-50-04-c3-c1-95
205.133.127.14
00-c0-f0-12-ad-59
205.133.127.16
00-10-4b-c9-61-37
205.133.127.17
00-50-da-11-f7-5f
205.133.127.30
0-50-da-0b-ff-4b
205.133.127.34
00-50-04-01-89-39
205.133.127.255
ff-ff-ff-ff-ff-ff
205.133.127.39
00-a0-4b-05-21-c8
205.133.127.47
00-c0-05-01-4e-4b
205.133.127.53
00-c0-05-04-39-2a
205.133.127.76
08-00-20-0b-6d-b9
205.133.127.84
00-c0-05-04-14-17
205.133.127.85
00-c0-05-04-1e-19
205.133.127.86
00-c0-05-04-39-2a
205.133.127.88
00-c0-05-04-5b-c9
205.133.127.101
00-c0-05-04-39-2a
205.133.127.110
00-c0-05-04-14-17
205.133.127.116
00-80-5f-e4-f1-46
205.133.127.158
00-c0-05-04-39-2a
205.133.127.234
00-40-33-ca-a1-5d
205.133.127.238
00-60-97-79-2-8a
Explanation / Answer
a)
1) Host 205.133.127.86 will send the packet directly to 205.133.127.83/84 because they are in same network.
2) Host 205.133.127.87 will send the packet directly to 205.133.127.83/84 because they are in same network.
3) 96.17.202.208 is not in the network of 205.133.127.xxx. This comes under different subnet mask.
So the host will send the packet to default gateway to broadcast the information for further transmitting it to other network and tries to retrieve the MAC address of the network.
b)
205.133.127.255 is registered for special functions like creating a gateway or to specify the new network mask.
It cannot be used by any host.
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