Which of the following is a correct arrangement of APS Action Requests in order of priority, with
highest priority first?

A.
Lookout of Protection, Forced Switch, SD, Manual Switch

B.
SD, Lockout of Protection, Forced Switch, Manual Switch

C.
Lockout of Protection, Manual Switch, SD, Forced Switch

D.
Manual Switch, Forced Switch, Lockout of Protection, SD

E.
Manual Switch, Lockout of Protection, Forced Switch, SD

Explanation:
1.1. Packet over SONET
Table 1 shows the priority requests from the highest (lockout) to the lowest (manual).
Table 1 APS Priority Request
Priority Priority Request
1 Lockout of protect port
2 Forced switch
3 Signal failure—low priority
4 Signal degradation—low priority
5 Manual switch