Practice Test Geeks(SAC) System Administration Certification Practice Test
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Networking and Security Fundamentals Flashcards

7 cards from real SAC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Networking and Security Fundamentals flashcards as text

  1. Which wireless security protocol is currently considered the strongest for enterprise networks?

    Answer: WPA3-Enterprise

    WPA3-Enterprise provides the strongest wireless security with 192-bit encryption and improved authentication.

  2. A user reports they cannot reach any websites but can ping the default gateway. What is the MOST likely cause?

    Answer: DNS server failure

    If the gateway is reachable but websites are not, DNS is likely failing to resolve domain names to IP addresses.

  3. Which OSI layer is responsible for end-to-end error detection and flow control?

    Answer: Layer 4 – Transport

    The Transport layer (Layer 4) manages end-to-end communication, error recovery, and flow control using protocols like TCP.

  4. What is the default subnet mask for a Class C IP address?

    Answer: 255.255.255.0

    Class C networks use a /24 prefix, corresponding to the subnet mask 255.255.255.0.

  5. Which attack involves sending unsolicited emails to trick users into revealing credentials?

    Answer: Phishing

    Phishing uses deceptive emails that impersonate trusted sources to steal usernames, passwords, or other sensitive data.

  6. In PKI, what is the role of a Certificate Authority (CA)?

    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.

  7. Which protocol provides secure remote login to network devices using port 22?

    Answer: SSH

    SSH (Secure Shell) provides encrypted remote access to network devices and servers over port 22.