2. Determine the TCP/IP protocol assigned the following port numbers: 19 7 162 2
ID: 641195 • Letter: 2
Question
2. Determine the TCP/IP protocol assigned the following port numbers:
19
7
162
25
111
520
5. Determine the meaning of the following session-bit flag fields:
11 hex
10 hex
18 hex
04 hex
02 hex
19 hex
6. Use the following network analyzer display of an IP datagram carrying UDP to answer the following questions:
0000 45 44 00 4A A0 A2 04 00 F5 11 A2 35 C0 99 B4 01
0010 C0 99 B4 02 D6 D8 00 45 00 36 20 A3 B2 91 00 A2
What IP version is being used?
Are IP options being used?
What is the precedence?
What type of service is being requested?
How many data bytes are included in the IP datagram (decimal)?
Is fragmentation allowed?
Is this the first, last, or a middle fragment?
What is the decimal number of the first byte in this fragment?
How many routers has this datagram propagated through (decimal)?
What is the source IP address (dotted decimal)?
What is the destination IP address (dotted decimal)?
What is the source port number (decimal)?
What is the category of the source port?
Is the source most likely a client or a server?
What is the destination port number (decimal)?
What is the category of the destination port?
Is the destination most likely a client or server?
What protocol is the destination process?
7. Use the following network analyzer display of an IP datagram carrying TCP to answer the following question:
0000 45 44 00 4A A0 A2 04 00 F5 06 A2 35 C0 99 40 B2
0010 C0 99 40 A1 00 35 D0 A2 04 A2 B1 22 00 1A 46 A2
0020 50 12 10 00 56 8F 00 00 00 00 00 00 00 00 00 00
What is the source port number (decimal)?
What is the category of the source port?
Is the source most likely a client or a server?
What is the destination port number (decimal)?
What is the category of the destination port?
Is the destination most likely a client or a server?
What protocol is the source process?
How many bytes are in the TCP header (decimal)?
Which session flags are set?
What is the sender
Explanation / Answer
Port No.
Protocol
Service Name
Aliases
Comment
7
TCP
echo
Echo
7
UDP
echo
Echo
9
TCP
discard
sink null
Discard
9
UDP
discard
sink null
Discard
13
TCP
daytime
Daytime
13
UDP
daytime
Daytime
17
TCP
qotd
quote
Quote of the day
17
UDP
qotd
quote
Quote of the day
19
TCP
chargen
ttytst source
Character generator
19
UDP
chargen
ttytst source
Character generator
25
TCP
smtp
Simple Mail Transfer
111
UDP
sunrpc
rpcbind portmap
SUN Remote Procedure Call
161
UDP
snmp
snmp
SNMP
162
UDP
snmptrap
snmp-trap
SNMP TRAP
Port No.
Protocol
Service Name
Aliases
Comment
7
TCP
echo
Echo
7
UDP
echo
Echo
9
TCP
discard
sink null
Discard
9
UDP
discard
sink null
Discard
13
TCP
daytime
Daytime
13
UDP
daytime
Daytime
17
TCP
qotd
quote
Quote of the day
17
UDP
qotd
quote
Quote of the day
19
TCP
chargen
ttytst source
Character generator
19
UDP
chargen
ttytst source
Character generator
25
TCP
smtp
Simple Mail Transfer
111
UDP
sunrpc
rpcbind portmap
SUN Remote Procedure Call
161
UDP
snmp
snmp
SNMP
162
UDP
snmptrap
snmp-trap
SNMP TRAP
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