CPA Network Security & Protocols 2 — Questions and Answers
Question 1: Which encryption protocol is used by HTTPS to secure web traffic?
- SSL 2.0
- TLS (Correct answer)
- WEP
- MD5
Correct answer: TLS
HTTPS uses TLS (Transport Layer Security) to encrypt data between the client and server.
Question 2: What does a DMZ (Demilitarized Zone) in network security accomplish?
- Encrypts all internal traffic
- Isolates public-facing servers from the internal network (Correct answer)
- Blocks all incoming traffic
- Provides VPN access to remote users
Correct answer: Isolates public-facing servers from the internal network
A DMZ places public-facing servers in a separate network segment, limiting exposure of the internal network if those servers are compromised.
Question 3: Which port does DNS typically use?
- 80
- 443
- 53 (Correct answer)
- 25
Correct answer: 53
DNS uses port 53 for both UDP (standard queries) and TCP (zone transfers or large responses).
Question 4: What is the primary purpose of an Intrusion Detection System (IDS)?
- Block malicious traffic in real time
- Monitor and alert on suspicious network activity (Correct answer)
- Encrypt network packets
- Assign IP addresses dynamically
Correct answer: Monitor and alert on suspicious network activity
An IDS monitors network or system activity and generates alerts when it detects suspicious or malicious behavior.
Question 5: Which protocol provides secure remote login and command execution over an encrypted connection?
- Telnet
- FTP
- SSH (Correct answer)
- SNMP
Correct answer: SSH
SSH (Secure Shell) encrypts the session, replacing the insecure Telnet protocol for remote administration.
Question 6: What is a man-in-the-middle (MITM) attack?
- Flooding a server with traffic to cause denial of service
- Intercepting and potentially altering communication between two parties (Correct answer)
- Brute-forcing login credentials
- Injecting malicious scripts into a web page
Correct answer: Intercepting and potentially altering communication between two parties
In a MITM attack, an adversary secretly intercepts and can modify messages between two communicating parties.
Question 7: What does the acronym ARP stand for in networking?
- Advanced Routing Protocol
- Address Resolution Protocol (Correct answer)
- Authenticated Relay Process
- Automatic Resource Provisioning
Correct answer: Address Resolution Protocol
ARP (Address Resolution Protocol) maps an IP address to its corresponding MAC address on a local network.
CPA Network Security & Protocols 2
Which encryption protocol is used by HTTPS to secure web traffic?