多选题Why would the network manager elect to implement a configuration that includes GRE tunnels for a eleworker deployment?（）AGRE can use transport mode and save up to twenty bytes per packet.BThe corporate network includes many discontinuous blocks of IP networks and requires split tunneling.CThe corporation's primary application is based on IP multicast.DWithout GRE, there is no means to detect a head-end failure.EGRE would enable path MTU discovery.
多选题
Why would the network manager elect to implement a configuration that includes GRE tunnels for a eleworker deployment?（）
A
GRE can use transport mode and save up to twenty bytes per packet.
B
The corporate network includes many discontinuous blocks of IP networks and requires split tunneling.
C
The corporation's primary application is based on IP multicast.
D
Without GRE, there is no means to detect a head-end failure.
E
GRE would enable path MTU discovery.
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