Internet Security

What is a firewall?

• A type of digital certificate
• A type of encryption method
• A program or hardware device that filters information coming through the Internet connection into your private network or computer system
• A type of virus that spreads through networks

What are the three methods used by firewalls to control traffic?

• Public key infrastructure, private key infrastructure, and digital certificates
• Symmetric encryption, asymmetric encryption, and hashing
• Packet filtering, proxy service, and encryption
• Packet filtering, digital certificates, and digital signatures

What is symmetric encryption?

• A part of public key infrastructure (PKI)
• A digital code generated and authenticated by public key encryption
• The key used to encrypt and decrypt a ciphertext is the same
• A set of roles, policies, and procedures needed to create, manage, distribute, use, store, and revoke digital certificates and manage public-key encryption

What is a digital certificate?

• A program or hardware device that filters information coming through the Internet connection into your private network or computer system
• An electronic identity proof used to verify the trustworthiness of message sender/websites
• A type of virus that spreads through networks
• A type of encryption method

What is public key infrastructure (PKI)?

• A set of roles, policies, and procedures needed to create, manage, distribute, use, store, and revoke digital certificates and manage public-key encryption
• A type of virus that spreads through networks
• A program or hardware device that filters information coming through the Internet connection into your private network or computer system
• A type of encryption method

What is a digital signature?

• A type of virus that spreads through networks
• A digital code generated and authenticated by public key encryption which is attached to an electronically transmitted document to verify its trustworthiness and the sender's identity
• A type of encryption method
• A program or hardware device that filters information coming through the Internet connection into your private network or computer system

What is a computer worm?

• A type of encryption method
• A type of virus that attaches itself to a program or file enabling it to spread from one computer to another
• A program or hardware device that filters information coming through the Internet connection into your private network or computer system
• A self-replicating computer program that penetrates an operating system with the intent of spreading malicious code

What is a computer virus?

• A type of virus that attaches itself to a program or file enabling it to spread from one computer to another
• A program or hardware device that filters information coming through the Internet connection into your private network or computer system
• A type of encryption method
• A self-replicating computer program that penetrates an operating system with the intent of spreading malicious code

What is packet filtering?

• Information from the Internet is retrieved by the firewall on behalf of other systems and then sent to the requesting system, and vice versa
• A digital code generated and authenticated by public key encryption which is attached to an electronically transmitted document to verify its trustworthiness and the sender's identity
• Packets are analysed against a set of filters: IP addresses, protocols and port numbers. Packets that make it through the filters are sent to the requesting system and all others are discarded
• A type of encryption method

What is proxy service?

• A type of encryption method
• Information from the Internet is retrieved by the firewall on behalf of other systems and then sent to the requesting system, and vice versa
• A digital code generated and authenticated by public key encryption which is attached to an electronically transmitted document to verify its trustworthiness and the sender's identity
• Packets are analysed against a set of filters: IP addresses, protocols and port numbers. Packets that make it through the filters are sent to the requesting system and all others are discarded