300+ câu trắc nghiệm tiếng anh chuyên nghành bảo mật thông tin có đáp án - Phần 5

A … is basically an intelligent hub; it works and looks exactly like a hub, with one significant difference. When a … receives a packet, it will send that packet only out the port for the computer to which it needs to go. A … essentially a hub that is able to determine where a packet is being sent.

… is a unit of data transmission. Has a header (shows origin, destination, packet type), body (data) and a footer (indicates when the message is over)

Which of the following reasons most likely made the Bagle virus spread so rapidly?

Multi-partite viruses attack the computer in multiple ways for example, infecting the boot sector of the … and one or more files.

When was Ethernet cable developed?

There is a third method, called … scanning.

It is based .........the fact that any device has operational limits.

By now you are aware, in a general way, of the dangers of the Internet, and you have ........a few basic rules for protection on the Internet.

… is fast becoming as big a problem, even bigger than viruses.

Another new type of virus has been gaining popularity in the past few years, and that is the “… virus” or, put simply, a hoax. Rather than actually writing a virus, a hacker sends an email to every address he has. The email claims to be from some well-known antivirus center and warns of a new virus that is circulating. The email instructs people to delete some file from their computer to get rid of the virus. The file, however, is not really a virus but part of a computer’s system.

What port does POP3 use?

Some well-known Trojan horses such as the 2nd Thought application that downloads to a person’s PC and then blasts it with ...

The –w option ..........how many milliseconds the ping utility will wait for a response from the target.

What is the most stealthy way to find out what type of server a website is running?

This virus is very interesting for multiple reasons. First, it specifically targets Macintosh computers.. What is this?

… is main transmission lines for internet connections

What kind of cable has 10Gbps speed and uses for very high-speed network?

A … hacker is the person normally depicted in the media. Once she gains access to a system, her goal is to cause some type of harm.

When was the birth of Usenet newsgroups?

Amplifier repeaters simply boost …

What can you do with a firewall to help protect against virus attacks?