Company ABC has started to implement IPv6 in their network and has rolled out dual-stack endpoint devices to their employees. Which security measure prevents ABC from replay attacks?

Which two mechanisms can provide fast Layer 2 down detection in Frame Relay networks?
(Choose two.)

Refer to the exhibit.

You are designing an IPv4 unicast Layer 3 VPN load-balancing solution. Which L3VPN feature needs to be configured on the PE routers to support the design requirement?

An existing wireless network was designed to support data traffic only. You must now install Context Aware services for location tracking. Which two changes must be applied to the existing wireless network to increase the location accuracy? (Choose two.)

Refer to the exhibit.

You are planning the design of an encrypted WAN. IP packets will be transferred over
encrypted GRE tunnels between routers B and C.
The packet size is limited to a maximum of 1500 bytes inside the WAN between routers B and C.
If endpoint 1 tries to send 1500byte IP packets to endpoint 2, in what three ways will the network design handle the fragmentation in three different possible network configurations? (Choose three.)