Which two of the following are default features of the Interior Gateway Routing Protocol (IGRP)?

The correct answer highlights two significant default features of the Interior Gateway Routing Protocol (IGRP). First, the route update period of 90 seconds means that IGRP routers will send routing updates to their neighbors every 90 seconds, ensuring that the routing information remains relatively current without overloading the network with excessive updates. This time period strikes a balance between timely updates and network efficiency.

Secondly, the maximum hop count of 100 indicates the maximum number of routers that a packet can pass through within a single IGRP routing domain before being considered unreachable. This limit is established to prevent routing loops and to ensure that packets do not circulate indefinitely in the network, providing a safeguard for efficient routing within the defined parameters.

Other options present default features that do not align with those established by IGRP. Specifically, not all the specified update intervals and hop counts accurately reflect the protocol’s standard configurations.