Which regular expression query modifier function indicates the start of a string?

Refer to the exhibit:

Router 1 was experiencing a DDoS attack that was traced to interface gjgabitethernet0/1.
Which statement about this configuration is true?

An engineer is developing a configuration script to enable dial-out telemetry streams using gRPC on several new devices. TLS must be disabled on the devices. Which configuration must the engineer apply on the network?
A)

B)

C)

D)

What causes multicast traffic to permanently stay on the shared tree and not switch to the source tree?

Refer to the exhibit.

A network engineer is configuring customer edge routers to finalize a L2VPN over MPLS deployment Assume that the AToM L2VPN service that connects the two CEs is configured correctly on the service provider network Which action causes the solution to fail?