Public-key Cryptography and Access Control

Take Test: Quiz 2
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Question 1
In asymmetric cryptography, what does a digital signature accomplish?

Proves the identity of the sender

Confirms the source of the message

Prevents others from viewing the message

Provides confidentiality protection
Question 2
This occurs when a parent network provides filtering for traffic before it enters the child network to which individual and business customers connect.

upstream filtering

firewall filtering

edge device filtering

defensive filtering
1 points
Question 3
To reduce risk of vulnerability, some VPNs use rekeying processes. This particular type of rekeying triggers when a specific amount of traffic is transmitted.

election rekeying

volume rekeying

idle rekeying

time rekeying
Question 4
________, a sub-set of asymmetric cryptography, is based on key pairs.

digital certificate

multi-factor authentication

ciphertext

public key cryptography
Question 5
A hacker captures and retransmits authentication packets against the same server in order to gain interactive or session access to a system. This describes which type of attack?

Replay

Insertion

Buffer overflow

Hijacking
Question 6
What is an advantage of VPN tunnel mode?

Encapsulates protocol headers only

Encapsulates packet payloads only

Encapsulates protocol headers and packet payloads

Does not encapsulate any part of the packet
Question 7
A ________ allows an organization to know and control the pathway of their transmissions.

client-to-server VPN

trusted VPN

distributed LAN

host-to-site VPN

Question 8
Which of the following attacks must take maximum transmission units (MTUs) into account?

Buffer overflow

Fragmentation

Replay

Cross-site scripting