WorksheetsInternet Security
Total questions: 20
Worksheet time: 10mins
Name
Class
Date
1.
What is a firewall?
a)
A type of digital certificate
b)
A type of encryption method
c)
A program or hardware device that filters information coming through the Internet connection into your private network or computer system
d)
A type of virus that spreads through networks
2.
What are the three methods used by firewalls to control traffic?
a)
Public key infrastructure, private key infrastructure, and digital certificates
b)
Symmetric encryption, asymmetric encryption, and hashing
c)
Packet filtering, proxy service, and encryption
d)
Packet filtering, digital certificates, and digital signatures
3.
What is symmetric encryption?
a)
A part of public key infrastructure (PKI)
b)
A digital code generated and authenticated by public key encryption
c)
The key used to encrypt and decrypt a ciphertext is the same
d)
A set of roles, policies, and procedures needed to create, manage, distribute, use, store, and revoke digital certificates and manage public-key encryption
4.
What is a digital certificate?
a)
A program or hardware device that filters information coming through the Internet connection into your private network or computer system
b)
An electronic identity proof used to verify the trustworthiness of message sender/websites
c)
A type of virus that spreads through networks
d)
A type of encryption method
5.
What is public key infrastructure (PKI)?
a)
A set of roles, policies, and procedures needed to create, manage, distribute, use, store, and revoke digital certificates and manage public-key encryption
b)
A type of virus that spreads through networks
c)
A program or hardware device that filters information coming through the Internet connection into your private network or computer system
d)
A type of encryption method
6.
What is a digital signature?
a)
A type of virus that spreads through networks
b)
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
c)
A type of encryption method
d)
A program or hardware device that filters information coming through the Internet connection into your private network or computer system
7.
What is a computer worm?
a)
A type of encryption method
b)
A type of virus that attaches itself to a program or file enabling it to spread from one computer to another
c)
A program or hardware device that filters information coming through the Internet connection into your private network or computer system
d)
A self-replicating computer program that penetrates an operating system with the intent of spreading malicious code
8.
What is a computer virus?
a)
A type of virus that attaches itself to a program or file enabling it to spread from one computer to another
b)
A program or hardware device that filters information coming through the Internet connection into your private network or computer system
c)
A type of encryption method
d)
A self-replicating computer program that penetrates an operating system with the intent of spreading malicious code
9.
What is packet filtering?
a)
Information from the Internet is retrieved by the firewall on behalf of other systems and then sent to the requesting system, and vice versa
b)
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
c)
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
d)
A type of encryption method
10.
What is proxy service?
a)
A type of encryption method
b)
Information from the Internet is retrieved by the firewall on behalf of other systems and then sent to the requesting system, and vice versa
c)
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
d)
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
11.
What is symmetric encryption also known as?
a)
Digital certificates
b)
Hashing
c)
Private key encryption
d)
Public key encryption
12.
What is asymmetric encryption also known as?
a)
Private key encryption
b)
Hashing
c)
Digital certificates
d)
Public key encryption
13.
What is a certificate authority (CA)?
a)
A type of virus that spreads through networks
b)
A type of encryption method
c)
A trusted third-party entity that issues digital certificates for use by other parties
d)
A program or hardware device that filters information coming through the Internet connection into your private network or computer system
14.
What is a private key?
a)
A key used in symmetric encryption that is shared between the sender and receiver
b)
A type of virus that spreads through networks
c)
A type of encryption method
d)
A key used in asymmetric encryption that is kept securely by the signer
15.
What is a public key?
a)
A type of virus that spreads through networks
b)
A key used in asymmetric encryption that is visible to the world
c)
A key used in symmetric encryption that is shared between the sender and receiver
d)
A type of encryption method
16.
What is a hash?
a)
A type of encryption method
b)
A program or hardware device that filters information coming through the Internet connection into your private network or computer system
c)
A type of virus that spreads through networks
d)
Data created from a document using a mathematical algorithm and encrypted to create a digital signature
17.
What is the purpose of a digital signature?
a)
To encrypt and decrypt a ciphertext using the same key
b)
To filter information coming through the Internet connection into your private network or computer system
c)
To create an electronic identity proof
d)
To verify the trustworthiness and the sender's identity of an electronically transmitted document
18.
What happens if a signed document changes after signing?
a)
The digital signature is still valid
b)
The document is encrypted
c)
The digital signature is invalidated
d)
The document is deleted
19.
What is the role of a certificate authority (CA) in issuing digital certificates?
a)
To create an electronic identity proof
b)
To filter information coming through the Internet connection into your private network or computer system
c)
To encrypt and decrypt a ciphertext using the same key
d)
To issue digital certificates for use by other parties
20.
What is the purpose of packet filtering?
a)
To retrieve information from the Internet on behalf of other systems
b)
To analyse packets against a set of filters and discard those that do not meet the criteria
c)
To create an electronic identity proof
d)
To encrypt and decrypt a ciphertext using the same key
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