Network issues and communication：练习题

Which of the following describes a method of authentication where a user must provide a physical object, such as a smart card or a hardware key, to gain access to a network?

A user logging into a secure system must enter a unique, time-sensitive security code generated by a small electronic device they carry. Which authentication method is being used?

During a video-conference involving participants from different continents, a significant delay in the audio and video stream is observed. Which factor is most likely to cause this latency?

A company uses biometric methods for employee authentication. Which of the following is an example of this method?

When comparing different types of electronic conferencing, which statement uniquely identifies a characteristic of web-conferencing?

Compare video-conferencing and audio-conferencing in terms of the hardware required and the type of communication possible.

Explain how biometric authentication methods, such as facial recognition, provide higher security than using traditional magnetic stripe cards for building access.

A multinational corporation uses video-conferencing to conduct monthly meetings.
(a) Identify two specific hardware components required to facilitate a video-conference that are not typically used in a standard word-processing setup.
(b) Describe two disadvantages of using video-conferencing compared to meeting in person at a single location.

Banks often use two-factor authentication (2FA) to protect user accounts during online banking.
(a) Explain the purpose of using two-factor authentication instead of just a password.
(b) Describe how a physical token or an electronic token is used as part of this authentication process.