Which three customer needs are addressed by Cisco solutions?（）

A.Content storage networking
B.Network optimization
C.Network management
D.Network security

A.Because voice data packets must follow a single dedicated path through the network
B.Because voice data packets should arrive quickly and sequentially, and with no lost data
C.Because lost voice-data packets must be retransmitted
D.Because data does not need to arrive intact, so data transfer rates can be variable

A.Providing a temporary network need
B.Ensuring secure presentations
C.Having freedom of movement within a network range
D.Augmenting an existing network