Description : A ________ is a set of rules that governs data communication. A) forum B) protocol C) standard D) none of the above
Last Answer : protocol
Description : A set of rules that governs data communication is called a. Protocols b. Standards c. RFCs d. Servers
Last Answer : a. Protocols
Description : Set rules implementing and governing an orderly exchange of data between layers of two devices, such as line control units and front – end processors.
Last Answer : Data Link Protocol
Description : Which NTC memorandum circular governs the rules and regulations about the manufacture, acquisition, sale and service of radio communication equipment? A. MC No. 2-05-88 B. MC No. 2-04-88 C. MC No. 2-07-88 D. MC No. 2-09-88
Last Answer : A. MC No. 2-05-88
Description : In the ________ traffic model, the rate of the data flow changes in time, with the changes smooth instead of sudden and sharp.
Last Answer : variable bit rate
Description : The ________ is a function of three values: average data rate, peak data rate, and maximum burst size.
Last Answer : Effective bandwidth
Description : In communication systems the frequency range used for voice is:
Last Answer : 300 Hz to 3800 Hz
Description : They proposed a new communication medium using cladded fiber cables.
Last Answer : Kao and Bockham
Description : One of the responsibilities of the transport layer protocol is to create a ______ communication.
Last Answer : process to process
Description : ________ defines how a particular pattern to be interpreted, and what action is to be taken based on that interpretation.
Last Answer : syntax
Description : Any energy above the ground state is called ________
Last Answer : excited state
Description : SONET sends ________ frames per second
Last Answer : 8000
Description : The signal from a satellite is normally aimed at a specific area called the ________
Last Answer : footprint
Description : A ________ is normally a computer that operates in all five layers of the Internet model or seven layers of OSI model.
Last Answer : gateway
Description : ________ is actually a multiport repeater. It is normally used to create connections between stations in a physical star topology
Last Answer : An active hub
Description : A ________ bridge can forward and filter frames and automatically build its forwarding table
Last Answer : transparent
Description : LEO satellites are normally below an altitude of ________ km
Last Answer : 2000
Description : A GEO is at the ________ orbit and revolves in phase with Earth.
Last Answer : equatorial
Description : The Monarch of the UK __________ (A) rules and governs. (B) reigns but does not rule. (C) reigns and rules. (D) rules but does not reign.
Last Answer : (B) reigns but does not rule.
Description : ____ is a process-to-process protocol that adds only port addresses, checksum error control, and length information to the data from the upper layer.
Last Answer : UDP
Description : _______ refers to the structure or format of the data, meaning the order in which they are presented.
Last Answer : Semantics
Description : Sixteen different levels (symbols) are used to encode binary data. The channel bandwidth is 36 MHz. The maximum channel capacity is
Last Answer : 288 Mbps
Description : It is proposed network designed by major telephone companies in conjunction with the ITU-T with the intent of providing worldwide telecommunications support for voice, data, video and facsimile information within the same networ
Last Answer : ISDN
Description : The characters making up the message in a synchronous transmission are collectively referred to as the data
Last Answer : block
Description : A transmission of binary data which involves the transmission of two non – zero voltage level
Last Answer : Bipolar
Description : It is how the primary designates the secondary as the designation of recipient of data
Last Answer : Selection
Description : Variation of biphase that is used for encoding SMPTE time code data and for recording on video tapes
Last Answer : Biphase – M
Description : A modulation technique where data rates in excess of 56 kbps can be achieved over telephone circuits
Last Answer : Trellis Code Modulation
Description : Data rate at which serial PCM bits are clocked out of the PCM encoder onto the transmission line.
Last Answer : line speed
Description : Classification of protocol that interprets a frame of data as a group of successive bit combined into predetermined pattern of fixed length, usually 8 bits each.
Last Answer : Character and Byte-oriented protocols
Description : Dividing the data block by a constant produces a remainder that is used for error detection.
Last Answer : Cyclic redundancy check
Description : Category of data transmission if the binary pulse is maintained for the entire bit time?
Last Answer : Return to zero
Description : A _______ is a connecting device that operates in the physical and data link layers of the Internet model.
Last Answer : bridge
Description : IEEE has defined the specifications for a wireless LAN, called _______, which covers the physical and data link layers.
Last Answer : . IEEE 802.11
Description : In IPv4, what is the value of the total length field in bytes if the header is 28 bytes and the data field is 400 bytes?
Last Answer : 428
Description : The magnetic field of an antenna is perpendicular to the earth. The antenna’s polarization ___
Last Answer : is horizontal
Description : It is the ratio of the power density radiated in a particular direction to the power density radiated to the same point by a reference antenna, assuming both antennas are radiating the same amount of power
Last Answer : directive gain
Description : The property of interchangeability for the transmitting and receiving operations is known as ____
Last Answer : reciprocity
Description : The fields surrounding the antenna do not collapse their energy back into the antenna but rather radiate it out in space
Last Answer : radiation field
Description : It is the ratio of the radiated to the reflected energy:
Last Answer : Radiation efficiency
Description : It is the resistance that, if it replaced the antenna, would dissipate exactly the same amount of power that the antenna radiates
Last Answer : . Radiation resistance
Description : Plots of field strength or power density with respect to the value at a reference point.
Last Answer : relative radiation pattern
Description : The radiation pattern plotted in terms of electric field strength or power density
Last Answer : absolute radiation pattern
Description : The line bisecting the major lobe, or pointing from the center of the antenna in the direction of maximum radiation is called _____
Last Answer : line of shoot
Description : A special type of transmission line that consist of conducting metallic tube through which high frequency electromagnetic energy is propagated
Last Answer : waveguide
Description : If energy is applied at the geometrical center of antenna, the antenna is said to be ___
Last Answer : center-fed
Description : The radiation pattern of collinear and a broadside antenna is __
Last Answer : bidirectional
Description : Hertz antenna are predominantly used with frequencies above
Last Answer : 2MHz
Description : The point on the antenna where the transmission line is connected is called _____
Last Answer : feedpoint
Description : The discone antenna is
Last Answer : useful as a UHF receiving antenna