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1594
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ICMP Message Types
Table A-1. ICMP Messages and their definitions
Symbol
Type
Code
&
11
0
1
12
1
2
13
0
14
0
15
0
16
0
17
0
18
0
Description
time exceeded:
time-to-live equals 0 during transit
time-to-live equals 0 during reassembly
parameter problem:
IP header bad (catchall error)
required option missing
timestamp request
timestamp reply
information request (obsolete)
information reply (obsolete)
address mask request
address mask reply
Query
Error
•
•
•
•
•
•
•
•
•
•
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