RHM3 part 3 April2024 201-300

It is used to connect dissimilar devices such as DCE to DTE and DTE to DCE.

It is the general term that describes the equipment that converts the digital signals to analog signals and interfaces the data terminal equipment to the analog transmission system.

Also known as baseband modem or line drivers. It can be use up to 40 ft or 12 m distance.

Is a modem technology that uses existing twisted pair telephone lines to transport high bandwidth data, such as multimedia and video, to service subscribers.

The analog signal is sampled and converted to a fixed-length, serial binary number for transmission.

Another term for gray code. This code is used to reduce the number of transmission errors.

An ASCII character code of 7 bits that is transmitted serially back to the transmitter every 10s until the transmitter recognizes it.

Program that runs on computers and servers that allows the computers to communicate over a network.

A device used to interconnect networks; routers operate at level three, the network layer, of the OSI protocol model and can change packets from one protocol to another.

Are set of channels dedicated for exchanging control information between mobile units and base stations.

30B+D has an aggregate bit rate of:

PLC means

It is a multiplexer with storage buffer and a minicomputer processor, and it may act to store and forward traffic and is used to hold program logic.

It is a two-port device which operates at the physical layer, and its job is to regenerate the signal over the same network before the signal becomes too weak or corrupted so as to extend the length to which the signal can be transmitted.

It is basically a multiport repeater which connects multiple wires coming from different branches.

Two nodes on an Ethernet LAN using coaxial cable are 200 m apart. How long will it take the stations to detect a collision?

It is a two-port device which operates at data link layer. It is a repeater, with add on functionality of filtering content by reading the MAC addresses of source and destination.

It is a multiport bridge which operates at data link layer. It can perform error checking before forwarding data that makes it very efficient as it does not forward packets that have errors.

It is a device like a switch, but operates in the network layer, that routes data packets based on their IP addresses.

It is a passage to connect two networks together that may work upon different networking models. It is generally more complex than switch or router.

It is when the input analog waveform is sampled by a sampling pulse with an output sampled waveform obtaining the shape of the input analog waveform.

It states that for a sample to be reproduced accurately in a PCM receiver, each cycle of the analog input signal must be sampled at least twice.

This is the ratio of the transmission but rate to the minimum bandwidth required for a particular modulation scheme.

Is the binary sum of all the binary information sent in the block.

Interconnects memory cards carried by people and in computers that are in close proximity to each other.

An IBM system for transferring data between IBM mainframes and other computers.

Is a globally accepted standard for digital cellular communications systems.

ISDN ready equipments are known as:

Which of the following filter has a limited or finite memory requirements?

It is the first level protocol standard as well as an electrical standard specifying handshaking and functions between the DTE and DCE.

It is used to transfer data between two devices at 8 or more bits at a time and also known as serial-by-word interface.

Is used for asynchronous transmission of data between DTE and the DCE.

It is a transparent switch that is used for making a standard telephone call on public telephone network.

It is also known as hold-and-forward network in which the data are divided into smaller segment known as packets prior to transmission through the network.

Is a switch that does nothing more than interconnect the source and destination terminal equipment. A circuit adds no value to the circuit.

Occurs when the magnitude of the sample exceeds the highest quantization interval.

This is a theoretical expectation of the bit error rate for a given system.

When the entire message has been sent, the transmitting computer will send ______________.

A link between computers in which each recognizes a software connection to the other; the physical connection is not continuous but consists of packets routed as transmitted.

It is where all radio-related functions are performed, and it consists of the BSC and the BTS.

To connect TE2 equipments to ISDN, a ________ is needed:

Noise and Quantization errors are less severe in:

All electronics and communications equipment except consumer products installed and/or located inside buildings or in sheltered structures shall be engineered, installed, operated and maintained in such a manner that _________ shall not result when normally used and operated.

Is the result to the loss of data that occurs when two stations transmit at the same time on a network.

It is a WAN technology with higher data rate at lower cost, however, it has bursty data and bandwidth on demand.

It is a high-performance, cell-oriented switching and multiplexing technology that utilizes fixed-length packets to carry different types of traffic.

It is defined by ITU-T as a service that provides transmission channels capable of supporting transmission rates greater than the primary data rate.

The process of rounding off the amplitudes of flat-top samples to a manageable number of levels.

It is the magnitude of the quantum.

To transmit each character or each message multiple times until it is properly received.

It handles the radio interface of the mobile station. It is the radio equipment needed to service each cell in the network.

The reference point in between TE2 and TA is:

Also known as Convolution Filter:

A standard telephone line has a bandwidth of 3,400 Hz, what is the required signal- to-noise ratio, of the channel to handle maximum channel capacity of 30 kbps?

It is a type of LAN that uses high frequency radio waves rather than wires to communicate and transmit data among nodes.

A network of Bluetooth devices.

A network of two or more piconets.

Classified as: - 802.15.4 - Low cost cable replacement technology - Close to 100M nodes in 2012 - Honeywell = HVAC systems - used for low power consumption and rely on long, multi-year battery life

It was developed to provide a wireless alternative to consumers for broadband Internet connections; these connections are now dominated by cable TV and DSL.

The system is deliberately restricted to a range of one meter to allow several independent infrared links to operate simultaneously in the same room.

This technology uses thin, inexpensive tags or labels containing passive radio circuits that can be queried by a remote wireless interrogation unit.

It is an ultrashort-range wireless whose range is rarely more than a few inches.

It is a wireless communications technology that can transmit data at speeds between 40 to 60 Mbps and eventually to 1 Gbps. It transmits ultra-low power radio signals with very short electrical pulses.

It is the process wherein the quantized intervals assigned to the individual PAM samples are converted into binary signals.

It is the random, thermal noise that is present only into the input of the PAM sampler when there is no analog input signal and it is converted to a PAM sample just as if it were a signal.

Is a system where each character transmitted contains one additional bit.

Is responsible for performing call processing and subscriber-related functions.

It occurs when the analog input signal changes at a faster rate than the digital- to-analog converter can maintain.

It is a delta modulation system where the step size of the DAC is automatically varied depending on the amplitude characteristics of the analog input signals.

The reference point in between NT2 and NT1 is:

A digital transmission line has a bandwidth of 2 MHz. With signal-to-noise of 36 dB, what is the maximum capacity the line can handle in Mbps?

Is a suite of protocols that allows a wide variety of computers to share the same network, and it forms a hierarchical much like the OSI model.

It is a transport layer connection- oriented protocol which is responsible for providing reliable communications between hosts and processes on different hosts.

It was developed as a mechanism to facilitate the transfer of files between computers.

The designation of each file or directory on the host computer connected to the Internet

In the PCM codes, the lowest magnitude positive and negative codes have the same voltage range as all the other codes.

It is a type of coding which determines each digit of the PCM code sequentially.

Process of X-ORing all the characters in a particular block of transmitted data.

It is a database used for the storage and management of subscriptions. These are permanent information.

It provides the largest range of addresses available for assignment to host computers (16777214 hosts).

It is evenly split using two bytes for the network portion and two bytes for the host portion of the address (65634 hosts).

It uses three bytes for the network portion and one byte for host dentification (254 hosts).

It is a single integrated-circuit chip that performs every function of a PCM encoder and decoder.

Digital channel vocoders that use bandpass filter to separate waveform into narrower sub-bands.

Is any interconnection of two or more stations that wish to communicate.

It is a unit that provides authentication and encryption parameters that verify the user's identity and ensure the confidentiality of each call.

A software program or hardware device designed to prevent unauthorized access to computers or networks.

Is a general term for the internet. It is a massive unseen networking infrastructure that is constantly changing and has never been mapped.

The input voltage of a compander with a maximum voltage range of 1V and a μ of 255 is 0.25. What are the output voltage and gain?

Is a company set up especially to tap into the internet.

Is a collection of high-speed data lines that connect major computer systems located around the world.

It causes crosstalk between channels that occupy adjacent time slots in a time- division-multiplexed carrier system.

It the binary pulse is maintained for the entire bit time.

It is the process of simultaneously transmitting two or more individual signals over a single communications channel.

It is a form of multiplexing wherein two data channels modulate the same frequency that has been shifted 90 deg in phase.

It uses an 8-kHz sample rate and and eight-bit PCM code, which produces a 64 kbps PCM line speed.

It is the basic building block of the FDM hierarchy, and was originally intended for the analog voice transmission.

Refers to data or information signal whether it is binary or analog voice or video. The digital data is applied directly to the medium.

It is the nth generation mobile phone technology. It is an IP based solution that will provide much faster access to the Internet