TCP/UDP Port Utilization
Figure 2: Initialization and Address Resolution Diagram
Initialization and Address Resolution
4600 Series IP Telephone | DHCP Server |
DHCP (UDP/IP)
Port: 68 
Port: 67
| TFTP Read Request (UDP/IP) | TFTP Server |
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Port: [1024 - 5000] |
| Port: 69 |
Operating System – | TFTP Data, ACKs & Errors |
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selected (a new port | Port: Operating System | |
is used for each file |
| – selected (a new port is |
requested) |
| used for each file |
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| transferred) |
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| DNS Server |
Port: [1024 - 5000] | DNS (UDP/IP) |
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Operating System |
| Port: 53 |
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| CNA Server |
Port: |
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| Port: As administered | ||
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Operating System- |
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| HTTP Server |
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| Port: Operating |
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| HTTP (TCP) |
| Port: 80 |
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Issue 2.2 April 2005 29
