0 — Test 597

Correct Answer: A. 24 collision domains and 1 broadcast domain
Explanation: Each switch port is its own collision domain. Broadcasts still reach every port. ALSO KNOW (related points): • What does a hub do with an incoming frame? → It repeats the frame out of every other port, and all its ports share one collision domain • Which device separates broadcast domains by default? → Router

Correct Answer: D. Router
Explanation: Routers do not forward Layer 2 broadcasts. VLANs on a switch can also separate broadcast domains.

Correct Answer: B. A router or a Layer 3 switch (inter-VLAN routing)
Explanation: VLANs are separate broadcast domains, so traffic between them must be routed. ALSO KNOW (related points): • At which layer does a repeater operate, and what does it do? → Layer 1; it regenerates and amplifies the signal • What is the role of a modem? → It converts digital data to and from an analog or line signal (modulation and demodulation) • At which OSI layer does a bridge operate? → Layer 2 (Data Link)

Correct Answer: C. Layer 1; it regenerates and amplifies the signal
Explanation: A repeater extends cable distance and has no awareness of addresses.

Correct Answer: B. It tracks connection state and allows return traffic that belongs to an established session
Explanation: A simple packet filter judges each packet by its headers alone, without context.

Correct Answer: B. An IDS detects and alerts; an IPS sits inline and can block traffic
Explanation: An IPS sits in the traffic path, so it can drop malicious packets. ALSO KNOW (related points): • What does a stateful firewall do that a simple packet filter does not? → It tracks connection state and allows return traffic that belongs to an established session • A proxy server between users and the internet can do which of the following? → Cache content, filter requests, and hide the client's IP address from destination servers • Which device connects networks that use different protocols and translates between them? → Gateway

Correct Answer: C. It converts digital data to and from an analog or line signal (modulation and demodulation)
Explanation: Many home 'routers' combine a modem, a router, a switch, and an access point in one box.

Correct Answer: D. Cache content, filter requests, and hide the client's IP address from destination servers
Explanation: A reverse proxy does the same kind of work on behalf of servers.

Correct Answer: B. The whole network segment goes down
Explanation: The central device is a single point of failure, but a single cable fault affects only one host.

Correct Answer: D. 15
Explanation: n(n - 1)/2 = 6 × 5 / 2 = 15. ALSO KNOW (related points): • Which fiber type is used for longer distances? → Single-mode fiber • Bluetooth typically forms which type of network? → PAN (Personal Area Network) • What happens if a bus-topology coaxial cable has no terminator at one end? → Signal reflections cause collisions and network failure