Public switched data network is a network of computers and leased lines that is developed and maintained by a vendor.
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Q24: With symmetric encryption, different keys are used;
Q25: HTTPS is a protocol for secure communication
Q40: There is one standard protocol,EVDO,which is used
Q41: One disadvantage of using VPN is that
Q42: The packet-filtering firewall is the simplest type
Q43: A Virtual Private Network creates the appearance
Q46: ATM protocol only supports data communications.
Q47: Use of SSL/TLS makes it safe to
Q48: Ethernet,the protocol developed for LANs,also is used
Q50: Asymmetric encryption is simpler and much faster
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