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Question from my new Cisco Press CCNA book
polm
Member Posts: 34 ■■□□□□□□□□
in CCNA & CCENT
Which of the following are not fields in an IP packet ? (Choose three.)
A. Flags
B. Length
C. Protocol
D. Source Address
E. Header Checksum
Now I was thinking that maybe they were trying to point out some differences in Packet vs. Header... but I just cant figure this one out.
The 20 byte IP header contains ALL of those feilds. What would the "packet" fields be ?
http://www.erg.abdn.ac.uk/user...t-pages/ip-packet.html <---IP Header
A. Flags
B. Length
C. Protocol
D. Source Address
E. Header Checksum
Now I was thinking that maybe they were trying to point out some differences in Packet vs. Header... but I just cant figure this one out.
The 20 byte IP header contains ALL of those feilds. What would the "packet" fields be ?
http://www.erg.abdn.ac.uk/user...t-pages/ip-packet.html <---IP Header
Comments
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Optionswildfire
Member Posts: 654
Thats a strange one indeed! they are all field in an IP packet, RFC 791 refers to this
http://www.netfor2.com/rfc791.txtLooking for CCIE lab study partnerts, in the UK or Online. -
Optionspolm
Member Posts: 34 ■■□□□□□□□□
According to the CiscoPress Book. The Answer:
A. Flags
C. Protocol
E. Header Checksum
I really don't think this question is valid. -
Optionspolm
Member Posts: 34 ■■□□□□□□□□
TCP Header : http://www.freesoft.org/CIE/Course/Section4/8.htm
Does NOT have : Flags, Length, Protocol, or Source Address. It DOES have a Checksum (combination of Header and Data)
UDP Header : http://www.erg.abdn.ac.uk/user...se/inet-pages/udp.html
Does NOT have : ALL of them.
So the author probably didnt mean to say TCP or UDP instead of IP.
Must have something to do with the word "Packet".
Any thoughts ? -
Optionspolm
Member Posts: 34 ■■□□□□□□□□
It can't be packet vs. header. Packet has a header.
http://en.wikipedia.org/wiki/Packet
Time to send the Author of this book ,Steve McQuerry, an email.
