Ethernet Lan Switching Part-2

shortNote

  • Preamble and SFD are  not including as a ethernet header
  • the minium size of an ethernet frame 64 bytes
  • 64 bytes(Header + Payload(packet) + Tralier) - 18bytes(header + tralier size) = 46 bytes
  • minium payload size is 46 bytes
  • if the payload size is less than 46 bytes , padding bytes are added
     e.g: 34 byte packet + 12 byte padding = 46 byte

 

1.what is the padding byte ?

2.what is the broadcast address?

3what is ARP?

4.what is ICMP?

5.why ARP request is broadcast and ARP reply is unicast?

6.FFFF:FFFF:FFFF what is this?

7.what is ping ?

8.what is round trip time ?

9.waht is icmp echo request and icmp echo reply?

10.why most of the time fist ping request meassage is drop?

12. what is aginging? 

13.You send a 36 byte ping to another computer and perform a packet capture to analyze the network traffic.you notice long series of the bytes of the 0000000 at the ethernet payload. how can you explain these zeros?

14.which one is the unicast and the broadcast address? {Arp request , Arp response , ICMP echo request , ICMP echo response