Human errors, ignorance, and omissions cause more than half of all security breaches sustained by networks.

Network security is more often compromised “from the inside” than from external sources.

A security policy should state exactly which hardware, software, architecture, or protocols will be used to ensure security.

Encryption is the last means of defense against data theft.

By default, the 802.11 standard offers substantial security.

____ is a social engineering practice in which a person attempts to glean access or authentication information by posing as someone who needs that information.

In a ____ attack, a person redirects or captures secure transmissions as they occur.

____ software searches a node for open ports.

A router that is not configured to drop packets that match certain suspicious characteristics is an example of a risk associated with ____.

An NOS that contains a “back door”is an example of a risk associated with ____.

A ____ attack occurs when an Internet chat user sends commands to a victim’s machine that cause the screen to fill with garbage characters and requires the victim to terminate their chat sessions.

A ____ attack occurs when a system becomes unable to function because it has been deluged with data transmissions or otherwise disrupted.

A ____ main function is to examine packets and determine where to direct them based on their Network layer addressing information.

A ____ firewall is a router (or a computer installed with software that enables it to act as a router) that examines the header of every packet of data it receives to determine whether that type of packet is authorized to continue to its destination.

A ____ attack occurs when a hacker uses programs that try a combination of a user ID and every word in a dictionary to gain access to the network.

A ____ attack occurs when a hacker tries numerous possible character combinations to find the key that will decrypt encrypted data.

The combination of a public key and a private key is known as a ____.

A(n) ____ is a password-protected and encrypted file that holds an individual’s identification information, including a public key.

The use of certificate authorities to associate public keys with certain users is known as ____.

____ is a public key encryption system that can verify the authenticity of an e-mail sender and encrypt e-mail data in transmission.

____ is a method of encrypting TCP/IP transmissions.

In ____ , a hacker forges name server records to falsify his host’s identity.

A VPN ____ authenticates VPN clients and establishes tunnels for VPN connections.

____ protocols are the rules that computers follow to accomplish authentication.

RADIUS and TACACS belong to a category of protocols known as AAA (____).

In ____, both computers verify the credentials of the other.