Appendix B: Well-known Protocol, Port, and Other Numbers 297
Table B-3 Commonly Used Protocols and Associated Port Numbers
Keyword Description UDP/TCP
Port
wap-vcal WAP vCal 9205
wap-vcard-s WAP vCard Secure 9206
wap-vcal-s WAP vCal Secure 9207
bmc-perf-sd BMC-PERFORM- 10128
SERVICE DAEMON
h323callsigalt h323 Call Signal Alternate 11720
vofr-gateway VoFR Gateway 21590
quake quake 26000
flex-lm FLEX LM (1–10) 27000 to 27009
traceroute traceroute use 33434
reachout REACHOUT 43188
B-4: Well-Known IP Multicast Addresses
Some client server applications use a multicast packet to send large streams of data to
many hosts with a single transmission. The multicast packet uses special addressing at
Layer 3 and Layer 2 to communicate with clients that have been configured to receive
these packets. The multicast packet contains a Class D IP address to specify the group of
devices that are to receive the packet. This group is known as the multicast group, and
the IP address translates directly to a multicast Ethernet address. The Ethernet multicast
address has the first 24 bits set to 01-00-5E, the next bit is set to 0, and the last 23 bits
are set to match the low 23 bits of the IP multicast address. Figure B-6 shows how Layer
3 multicast addresses translate to Layer 2 Ethernet addresses.
Section B-4
To Next Page
Loading...
