| 1: | |
| A: | IGRP does not use a UDP port. It is accessed directly from the network layer, as protocol number 9. |
| 2: | |
| A: | The maximum IGRP network diameter is 255 hops. |
| 3: | |
| A: | The default IGRP update period is 90 seconds. |
| 4: | |
| A: | IGRP specifies an autonomous system number so that multiple IGRP processes can be enabled within the same routing domain and even on the same router. |
| 5: | |
| A: | McCloy will advertise 192.168.1.0 to Acheson as a system route because the address is being advertised into another major network. Acheson will advertise 172.16.0.0 as a system route to McCloy, and as an interior route to Kennan. |
| 6: | |
| A: | The default IGRP holddown time is 280 seconds. |
| 7: | |
| A: | IGRP can use bandwidth, delay, load, and reliability to calculate its metric. By default, it uses only bandwidth and delay. |
| 8: | |
| A: | An IGRP update packet can carry up to 104 route entries. |