Exam 12: Network Security

____ is high-quality encryption software that has become quite popular for creating secure e-mail messages and encrypting other types of data files for average users.

One of the primary functions of Kerberos is to authenticate users.

____ is data before any encryption has been performed.

A firewall cannot limit users on the Internet from accessing certain portions of a corporate network.

The idea behind ____________________ spread spectrum transmission is to bounce the signal around on random frequencies rather than transmit it on one fixed frequency.

Some computer systems generate random passwords that are very difficult to guess, but are also hard to remember.

With ____________________, the data is encrypted using DES three times-the first time by a first key, the second time by a second key, and the third time by the first key again.

____________________ is the art and science of hiding information inside other, seemingly ordinary messages or documents.

Pings are used most commonly by Unix-based systems.

____________________ is the study of creating and using encryption and decryption techniques.

A ____ is a common Internet tool used to verify if a particular IP address of a host exists and to see if the particular host is currently available.

Antivirus software with ________________________________________ runs in the background while an application that the user is executing runs in the foreground.

When hackers will even go so far as to create an application that appears to be legitimate and prompts users for an ID and password, the type of attack is termed ____________________.

How does phishing work?

A ____ cipher is different from a substitution-based cipher in that the order of the plaintext is not preserved.

In ____, a Web user seeking to visit a particular company's Web site is unknowingly redirected to a bogus Web site that looks exactly like that company's official Web site.

____ may be considered a form of physical protection.

Auditing a computer system is often a good way to deter crime.

The ____ is a commonly employed encryption method used by businesses to send and receive secure transactions.

Controlling access to a computer network involves deciding and then limiting who can use the system and when the system can be used.