SAC Networking and Security Fundamentals 3 — Questions and Answers
Question 1: Which wireless security protocol is currently considered the strongest for enterprise networks?
- WEP
- WPA
- WPA2-PSK
- WPA3-Enterprise (Correct answer)
Correct answer: WPA3-Enterprise
WPA3-Enterprise provides the strongest wireless security with 192-bit encryption and improved authentication.
Question 2: A user reports they cannot reach any websites but can ping the default gateway. What is the MOST likely cause?
- Incorrect subnet mask
- DNS server failure (Correct answer)
- Duplicate IP address
- Bad network cable
Correct answer: DNS server failure
If the gateway is reachable but websites are not, DNS is likely failing to resolve domain names to IP addresses.
Question 3: Which OSI layer is responsible for end-to-end error detection and flow control?
- Layer 1 – Physical
- Layer 3 – Network
- Layer 4 – Transport (Correct answer)
- Layer 6 – Presentation
Correct answer: Layer 4 – Transport
The Transport layer (Layer 4) manages end-to-end communication, error recovery, and flow control using protocols like TCP.
Question 4: What is the default subnet mask for a Class C IP address?
- 255.0.0.0
- 255.255.0.0
- 255.255.255.0 (Correct answer)
- 255.255.255.128
Correct answer: 255.255.255.0
Class C networks use a /24 prefix, corresponding to the subnet mask 255.255.255.0.
Question 5: Which attack involves sending unsolicited emails to trick users into revealing credentials?
- DoS attack
- Man-in-the-middle
- Phishing (Correct answer)
- ARP spoofing
Correct answer: Phishing
Phishing uses deceptive emails that impersonate trusted sources to steal usernames, passwords, or other sensitive data.
Question 6: In PKI, what is the role of a Certificate Authority (CA)?
- Assign IP addresses to devices
- Issue and sign digital certificates to verify identity (Correct answer)
- Encrypt data during transmission
- Monitor network traffic for intrusions
Correct answer: Issue and sign digital certificates to verify identity
A CA is a trusted entity that issues digital certificates, binding public keys to verified identities.
Question 7: Which protocol provides secure remote login to network devices using port 22?
- Telnet
- RDP
- SSH (Correct answer)
- SNMP
Correct answer: SSH
SSH (Secure Shell) provides encrypted remote access to network devices and servers over port 22.
SAC Networking and Security Fundamentals 3
Which wireless security protocol is currently considered the strongest for enterprise networks?