QUESTION $16$

In hierarchical routing, the job of intra$-$AS routing is to learn which destinations are reachable through neighboring ASes.

True

False

QUESTION $17$

If the "link state" algorithm uses the physical length of the link as the link cost, then there will be no oscillation problem.

True

False

QUESTION $18$

The link layer provides services for both flow control and congestion control

True

False

QUESTION $19$

Parity check can NOT be used to correct bit error.

$$ True

False