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Networking Fundamentals Flashcards

7 cards from real ACA 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 Fundamentals flashcards as text

  1. What is the purpose of the DNS (Domain Name System) protocol?

    Answer: To translate human-readable domain names into IP addresses

    DNS resolves fully qualified domain names (e.g., www.example.com) into IP addresses so hosts can route packets to the correct destination.

  2. Which technology allows multiple physical network interfaces to be combined into a single logical link for increased bandwidth and redundancy?

    Answer: Link Aggregation (LACP / 802.3ad)

    Link Aggregation (IEEE 802.3ad / LACP) bonds multiple physical links into one logical interface, combining their bandwidth and providing failover if one link fails.

  3. What is the purpose of QoS (Quality of Service) in a network?

    Answer: To prioritize certain traffic types to ensure bandwidth and low latency for critical applications

    QoS classifies and prioritizes traffic — such as VoIP or video — to guarantee acceptable latency, jitter, and bandwidth even during network congestion.

  4. Which of the following best describes a collision domain?

    Answer: A network segment where simultaneous transmissions cause packet collisions

    A collision domain is a network segment in which two devices transmitting simultaneously can cause a collision; each switch port creates its own separate collision domain.

  5. What is the administrative distance of a static route configured on a Cisco/Aruba device by default?

    Answer: 1

    Static routes have a default administrative distance of 1, making them preferred over dynamic routing protocols but second only to directly connected routes (AD 0).

  6. What does the TTL (Time to Live) field in an IP packet header prevent?

    Answer: Packets from looping indefinitely through a network

    TTL is decremented by 1 at each router hop; when it reaches zero, the packet is discarded, preventing routing loops from keeping packets alive forever.

  7. Which network topology connects every device directly to a central switch or hub?

    Answer: Star

    In a star topology, all end devices connect to a central switch or hub, making troubleshooting easier and limiting the impact of a single device failure.