CCNT 試験問題を無料オンラインアクセス

Which of the following is NOT true about TCP/IP?

• A.The IP address allows packets to travel across networks to the correct destination
• B.TCP/IP provides error check, and alerts the sender if it detects corrupt packets.
• C.The IP address identifies your system in a TCP/IP network.
• D.IP services are traditional and new services using IP as the delivery mechanism for data.

Which standard governs the development of Switched Multimegabit Data Service (SMDS)?

• A.802.4
• B.802.6
• C.802.8
• D.802.11

What type of line coding is used by most digital communications systems?

• A.QAM
• B.Unipolar
• C.Bipolar
• D.FSK

Asymmetric digital subscriber line is a DSL technology that:

• A.Transmits downstream at a greater rate than it transmits upstream.
• B.Transmits downstream and upstream at a consistent rate.
• C.Uses a different range of frequencies for downstream and upstream transmission.
• D.Transmits upstream at a greater rate than it transmits downstream.

What does the codec do to avoid conversation delays?

• A.It converts analog voice signals to digital.
• B.All of the above.
• C.It divides the voice signal into talk spurts.
• D.It re-transmits corrupted voice packets.