0 — Test 322

Correct Answer: B. B. Non-optimal
Explanation: Hierarchical routing is simple but it is not optimum. In order to achieve optimum route, every router must be aware of all the routers in the network, it is not possible in hierarchical routing.

Correct Answer: C. C. Non-optimal
Explanation: Hierarchical routing does not provide optimum paths for the packet transmission, because every router is not aware of the routes other that the core routers. And, each region may use different local routing algorithms which makes routing non-optimal.

Correct Answer: A. A. True
Explanation: A large network is divided into levels which facilitates the devices with good channel allocation. As the number of devices decreases for each part(region), the network communication will be easy in regions.

Correct Answer: D. D. Number of ports
Explanation: Number of ports don’t affect the traffic because each port will have its own collision domain to provide descent traffic. MAC address is used to send the packets to destination ports to avoid collision.

Correct Answer: C. C. Enterprise managed switch
Explanation: Enterprise managed switch has advanced features like SNMP age, web interface and CLI prompt. Unlike unmanaged switches, it can modify the changes, display, restore and backup the configuration.

Correct Answer: A. A. Filtering the data
Explanation: Main disadvantage of the hub is, it broadcasts every message without filtering the address in it. As the hub has no intelligence, it sends packets to every port. Also, bandwidth will be wasted for the ports, which are not interested in receiving the packet.

Correct Answer: D. D. Passive, active, intelligent
Explanation: Passive hubs are used in physical networks, where each device is connected to it physically. Active hubs keep an eye on packets that are being transmitted using store technology. Intelligent hubs have more features such as problem resolving, good performance.

Correct Answer: B. B. It has routing tables
Explanation: A switch has no intelligence, and it does not need information about the routes as it uses broadcast messages. Regardless of routes are routing tables and broadcast messages will be sent to each port.

Correct Answer: A. A. Electrical signals
Explanation: Physical layer takes care of the electrical signal, which needs to be passed through different media. Bits are sent as electrical signal and can be converted into light pulses also.

Correct Answer: B. B. Hub
Explanation: Hub and repeater are the physical layer devices which does not concern data link layer addresses in any way to transmit the frames. A hub has multiple lines to connect devices and sends frames that arrive on one line to every line regardless of destination.