Bob obtained the following information from a workstation: C:\\>ipconfig Windows

Question

Bob obtained the following information from a workstation:

C:>ipconfig

Windows IP Configuration

Ethernet adapter El90x 1:

IP Address : 10.0.0.98

Subnet Mask : 255.255.0.0

Default Gateway : 10.0.250.254

He checked his arp table with the following entry:

C:>arp -a

Interface: 10.0.0.98 on Interface 2

Internet Address Physical Address Type

10.0.250.254 00-eO-bO-ac-ac-a8 dynamic

Next, he executed the following command:

C:>ping 10.0.255.255

And received the following reply:

Pinging 10.0.255.255 with 32 bytes of data:

Reply from 10.0.255.255: bytes=32 time<10ms ttl="255"

Reply from 10.0.255.255: bytes=32 time<10ms ttl="255"

Reply from 10.0.255.255: bytes=32 time<10ms ttl="255"

finally he obtained the following:

C:> arp-a

Interface: 10.0.0.98 on Interface 2

Internet Address Physical Address Type

10.0.116.21 00-00-f4-a9-9d-d4 dynamic

10.0.224.34 00-00-ld-Of-4b-71 dynamic

10.0.108.2 00-00-f4-a9-98-21 dynamic

10.0.17.129 00-00-f4-b1-b6-57 dynamic

10.0.7.141 00-10-5a-05-ef-f9 dynamic

10.0.0.153 00-60-bO-79-c3-80 dynamic

10.0.3.3 00-eO-34-8b-2f-ff dynamic

10.0.1.250 00-00-Oc-4e-32-90 dynamic

10.0.1.251 00-00-Oc-4e-32-90 dynamic

10.0.250.254 00-eO-bO-ac-ac-a8 dynamic

169.254.0.1 00-00-09-6c-4b-58 dynamic

a. How can Bob account for the new entries in his arp table?

b. How would you explain the arp entry for 10.0.1.250 and 10.0.1.251?

c. How would you explain the arp entry for 169.254.0.1?

Explanation / Answer

before ping the arp-a only shows the address of default gateway... but after ping the data packet are passed through multiple gateway ..so the arp-a shows that all the gateway address ......where data are travelled all entries are the address of different gateways ..

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