RC EST 52

The _______ is the physical path over which a message travels. protocol signal medium all of the choices

medium

If an Optical Carrier is represented as OC-n, generally the link speed equals (in Mbps) __________ n x 39.8 None of the choices n x 51.8 2n x 51.8

n x 51.8

Which of the following allows VLAN connection between switches?1. ISL 2. VTP 3. 802.1q 4. 802.3Z None of the choices only 1 and 3 only 2 only 2 and 4

only 1 and 3

An analog signal carries 5 bits in each signal unit. If 3000 signal units are sent per second, find the baud rate and the bit rate. 3000 baud/s and 15000 bps 300 bauds/s and 1500 bps 300 bauds/s and 15000 bps 3000 bauds/s and 1500 bps

3000 baud/s and 15000 bps

Most of the wireless systems today operate at a frequency of about: 800 MHz 100 MHz None of the choices 90 MHz

800 MHz

What is the elementary function of the transport layer? Updating and maintaining IP addresses End to end delivery Synchronization of common network protocols Point-to-point telecommunications

End to end delivery

What are the types of wireless transmission? Infrared communication Bluetooth communication All of the choices Satellite communication

All of the choices

In which media access control technique, collisions are the highest? CSMA/CD Reservation CSMA/CA Token Passing

CSMA/CD

In one switch, three distinct VLANs are configured: VLAN2, VLAN3, and VLAN4. A router is used to communicate between VLANs. What type of router interface is necessary if only one connection is to be created between the router and the switch? Ethernet 100 Mbps Serial 56 kbps Ethernet 10 Mbps None of the choices

Ethernet 100 Mbps

______ helps to identify the weak or vulnerable points of a program or a network. Trojan Ethical hacking Segmentation VPN

Ethical hacking

Which type of network security acts as a barrier between the internal and external networks among which data is shuffled? Network Access Control Network Segmentation Firewall VPN

Firewall

Which mode is characteristically used for installing networks in wireless communication devices? Fixed and wireless Mobile and wired Mobile and wireless Fixed and wired

Fixed and wired

Which of the following belongs to unguided media? Twisted pair Coaxial cable Free space Fiber-optic cable

Free space

A device that interconnects various heterogeneous networks is ____________ Switch Gateway Hub All of the choices

Gateway

What is star topology? None of the choices Many computers are connected through a single cable. Many computer networks are connected through a hub. Computers are connected to each other.

Many computer networks are connected through a hub.

What is the correct formula for transmission time? Distance/Bandwidth Message size/Bandwidth Distance/Propagation speed Message size/Distance

Message size/Bandwidth

___ is the process of restoring and recovering the working operation. Monitoring Network recovery None of the choices Network performance

Network recovery

There are seven layers to network security that target the potential areas of vulnerability in a program or network. Which model is used to represent these layers? Apple Onion Rosette Corn

Onion

Which malware can work independently by slowing down the network bandwidth? Virus Ransomware Worm Trojan

Worm

Select the characteristic which does not belong to network performance. Speed Throughput Latency Bandwidth

Speed

Network speeds should be boosted by giving hosts additional bandwidth and limiting the number of broadcast domains. Which of the following options will assist you in achieving your objective? None of the choices Bridges Controlled hubs Switches

Switches

On which principle is the fiber-optic cable based? Frequency modulation None of the choices Phase modulation Total internal reflection

Total internal reflection

Which cable is used for voice and data communication? Fiber-optic cable Coaxial cable Twisted pair Shielded cables

Twisted pair

Any resource can be located on the internet using URL; URL stands for: None of the choices Uniform Run Locator Unique Resource Locator Uniform Resource Locator

Uniform Resource Locator

The transmission in wireless technology takes place by means of using ____________ electrical signal All of the choices electromagnetic signal electronic signal

electromagnetic signal