Description : If link transmits 4000 frames per second and each slot has 8 bits, the transmission rate of circuit of this TDM is ______. a. 64 Kbps b. 32 Mbps c. 32 Kbps d. 64 MbpS
Last Answer : c. 32 Kbps
Description : There are 10 users plugged into a hub running 10Mbps half-duplex.and a server connected to the switch running 10Mbps half- duplex as well. Find the bandwidth does each host have to the server? a. 100 kbps b. 1 Mbps c. 2 Mbps d. 10 Mbps
Last Answer : d. 10 Mbps
Description : Broad Band ISDN handles data rate of about (A) 64 kbps (B) 100 mbps (C) 5.4 mbps (D) 2.048 mbps
Last Answer : (A) 64 kbps
Description : How much packet data rate per user is supported by W-CDMA if the user is stationary? a) 2.048 Kbps b) 100 Mbps c) 2.048 Mbps d) 1 Gbps
Last Answer : c) 2.048 Mbps
Description : A sender uses the Stop-and-Wait ARQ protocol for reliable transmission of frames. Frames are of size 1000 bytes and the transmission rate at the sender is 80 Kbps (1Kbps = 1000 bits/second). Size of ... is lost, the sender throughput is __________ bytes/second. a. 2500 b. 2000 c. 1500 d. 500
Last Answer : a. 2500
Description : A noiseless 3 KHz Channel transmits bits with binary level signals. What is the maximum data rate? A. 3 Kbps B. 6 Kbps C. 12 Kbps D. 24 Kbps
Last Answer : 6 Kbps
Description : What is the channel symbol rate in Bluetooth for each user? a) 270.833 Kbps b) 1 Gbps c) 100 Mbps d) 1 Mbps
Last Answer : d) 1 Mbps
Description : Assume that we need to download text documents at the rate of 100 pages per minute. A page is an average of 24 lines with 80 characters in each line and each character requires 8 bits. Then the required bit rate of the channel is ... ...... (A) 1.636 Kbps (B) 1.636 Mbps (C) 2.272 Mbps (D) 3.272 Kbps
Last Answer : Answer: Marks given to all
Description : If link transmits 4000 frames per second and each slot has 8 bits, the transmission rate of circuit of this TDM is ............... (A) 64 Kbps (B) 32 Mbps (C) 32 Kbps (D) 64 Mbps
Last Answer : (C) 32 Kbps
Description : What type of communication media is the most widely usedcabling for data transfer today? A) Cat 5 B) Twisted pair C) Coaxial D) Optical fiber
Last Answer : Cat 5
Description : Determine the maximum length of the cable (in km) for transmitting data at a rate of 500 Mbps in an Ethernet LAN with frames of size 10,000 bits. Assume the signal speed in the cable to be 2,00,000 km/s. b. 2 c. 2.5 d. 5
Last Answer : b. 2
Description : Consider a CSMA/CD network that transmits data at a rate of 100 Mbps (108 bits per second) over a 1 km (kilometre) cable with no repeaters. If the minimum frame size required for this network is 1250 bytes, what is the signal speed (km/sec) in the cable? a. 8000 b. 10000 c. 16000 d. 20000
Last Answer : d. 20000
Description : ……………….. is a high performance fiber optic token ring LAN running at 100 Mbps over distances upto 1000 stations connected. A) FDDI B) FDDT C) FDDR D) FOTR
Last Answer : A) FDDI
Description : ........... is a high performance fiber optic token ring LAN running at 100 Mbps over distances up to 1000 stations connected. A) FDDI B) FDDT C) FDDR D) FOTR
Description : .is a high performance fiber optic token ring LAN running at 100 Mbps over distances up to 1000 stations connected. A) FDDI B) FDDT C) FDDR D) FOTR
Description : Suppose transmission rate of a channel is 32 kbps. If there are ‘8’ routes from source to destination and each packet p contains 8000 bits. Total end to end delay in sending packet P is _____. a. 2 sec b. 3 sec c. 4 sec d. 1 sec
Last Answer : a. 2 sec
Description : In a digital transmission, the receiver clock is 0.1 percent faster than the sender clock. How many extra bits per second does the receiver receive if the data rate is 1 Mbps ? (A) 10 bps (B) 100 bps (C) 1000 bps (D) 10000 bps
Last Answer : (C) 1000 bps
Description : What kind of transmission medium is most appropriate to carry data in a computer network that is exposed to electrical interferences? a) Unshielded twisted pair b) Optical fiber c) Coaxial cable d) Microwave
Last Answer : b) Optical fiber
Description : The maximum frame length for 10-Mbps Ethernet is ________ bytes. A) 1518 B) 1500 C) 1200 D) none of the abov
Last Answer : 1518
Description : A multiplexer combines four 100-Kbps channels using a time slot of 2 bits. What is the bit rate? (A) 100 Kbps (B) 200 Kbps (C) 400 kbps (D) 1000 Kbps
Last Answer : (C) 400 kbps
Description : How much power (roughly) a light emitting diode can couple into an optical fiber? a. 100 microwatts b. 440 microwatts c. 100 picowatts d. 10 miliwatts
Last Answer : 100 microwatts
Description : The inner core ofan optical fiber is _______ in composition. A) glass or plastic B) copper C) bimetallic D) liquid
Last Answer : glass or plastic
Description : In an optical fiber, the inner coreis _______ the cladding. A) denser than B) less dense than C) the samedensityas D) another name for
Last Answer : denser than
Description : Which of the following uses a very thin glass or plastic fiber through which pulses of light travel? a. Cat 1 b. Optical fiber c. Twisted pair d. Coax
Last Answer : b. Optical fiber
Description : The physical layer provides __________ a. mechanical specifications of electrical connectors and cables b. electrical specification of transmission line signal level c. specification for IR over optical fiber d. all of the mentioned
Last Answer : d. all of the mentioned
Description : Which transmission media provides the highest transmission speed in a network? a. coaxial cable b. twisted pair cable c. optical fiber d. electrical cable
Last Answer : c. optical fiber
Description : Identify the non suitable medium for 802.3 ethernet? a. A thin coaxial cable b. A twisted pair cable c. A microwave link d. A fiber optical cable
Last Answer : c. A microwave link
Description : The main hardware components of a graphics workstation are …………… A. Thick coax, optical fiber B. twisted pair , thin coax C. twisted, optical fiber D. Thick coax, Thin coax
Last Answer : D. Thick coax, Thin coax
Description : The physical layer provides __________ A. mechanical specifications of electrical connectors and cables B. electrical specification of transmission line signal level C. specification for IR over optical fiber D. all of the mentioned
Last Answer : D. all of the mentioned
Description : What specifications does physical layer provides __________. A. mechanical specifications of electrical connectors and cables B. electrical specification of transmission line signal level C. specification for IR over optical fiber D. all of the mentioned
Description : Which of the following cannot be used as a medium for 802.3 ethernet? a) A thin coaxial cable b) A twisted pair cable c) A microwave link d) A fiber optical cable
Last Answer : c) A microwave link
Description : Which of this is not a guided media? a) Fiber optical cable b) Coaxial cable c) Wireless LAN d) Copper wire
Last Answer : c) Wireless LAN
Description : The physical layer provides __________ a) mechanical specifications of electrical connectors and cables b) electrical specification of transmission line signal level c) specification for IR over optical fiber d) all of the mentioned
Last Answer : d) all of the mentioned
Description : Which transmission media provides the highest transmission speed in a network? a) coaxial cable b) twisted pair cable c) optical fiber d) electrical cable
Last Answer : c) optical fiber
Description : The inner core of an optical fiber is in composition. a. copper b. liquid c. glass or plastic d. bimetallic
Last Answer : c. glass or plastic
Description : A pure ALOHA Network transmits 200 bit frames using a shared channel with 200 Kbps bandwidth. If the system (all stations put together) produces 500 frames per second, then the throughput of the system is ______. a. 0.384 b. 0.184 c. 0.286 d. 0.58
Last Answer : b. 0.184
Description : Station A uses 32 byte packets to transmit messages to Station B using a sliding window protocol. The round trip delay between A and B is 80 milliseconds and the bottleneck bandwidth on the path between A and B ... What is the optimal window size that A should use? a. 20 b. 40 c. 160 d. 320
Last Answer : b. 40
Description : What is the maximum theoretical data rate of the above problem if one transponder is used for binary transmission? A. 36 Mbps B. 72 Mbps C.18 Mbps D. 144 Mbps
Last Answer : B. 72 Mbps
Description : An IP datagram of size 1000 bytes arrives at a router. The router has to forward this packet on a link whose MTU (maximum transmission unit) is 100 bytes. Assume that the size of the IP header is 20 bytes ... the IP datagram will be divided into for transmission is : a. 10 b. 50 c. 12 d. 13
Last Answer : d. 13
Description : An example of a medium speed, switched communications service is a. series 1000 b. data phone 50 c. DDD d. All of the above
Last Answer : DDD
Description : Why is my external USB hard drive transfer rate capping at 1 MBPS?
Last Answer : check the wire,change one for test
Description : ________ is a high-speed real-time interface for serial bus and it has data transfer up to 400 Mbps. A. Serial Port B. Fire wire C. Parallel Port D. None of the Above
Last Answer : B. Fire wire
Description : Standard Ethernet (10-Mbps) uses_______ encoding A) NRZ B) AMI C) Manchester D) differential Manchester
Last Answer : Manchester
Description : The minimum frame length for 10-Mbps Ethernet is _______bytes. A) 32 B) 80 C) 128 D) none of the above
Last Answer : none of the above
Description : The IEEE 802.3 Standard defines _________ CSMA/CD as the access method for first-generation 10-Mbps Ethernet. A) 1-persistent B) p-persistent C) non-persistent D) none of the above
Last Answer : 1-persistent
Description : A 8-Mbps tokenring has atoken holding timer value of 10 msec. What is the longest frame (assumeheader bits are negligible) that canbe sent on this ring? A. 8000 B frame B. 80,000 B frame C. 8 x 105 bit frame D. 10,000 B frame
Last Answer : 10,000 B frame
Description : A network with bandwidth of 10 Mbps can pass only an average of 12,000 frames per minute with each frame carrying an average of 10,000 bits. What is the throughput of this network ? a. 1 Mbps b. 2 Mbps c. 10 Mbps d. 12 Mbps
Last Answer : b. 2 Mbps
Description : A network with bandwidth of 10 Mbps can pass only an average of 15,000 frames per minute with each frame carrying an average of 8,000 bits. What is the throughput of this network? a. 2 Mbps b. 60 Mbps c. 120 Mbps
Last Answer : a. 2 Mbps
Description : Suppose that the one-way propagation delay for a 100 Mbps Ethernet having 48-bit jamming signal is 1.04 micro-seconds. The minimum frame size in bits is: a. 112 b. 160 c. 208 d. 256
Last Answer : d. 256
Description : Suppose the round trip propagation delay for a 10 Mbps Ethernet having 48-bit jamming signal is 46.4 ms. The minimum frame size is a. 94 b. 416 c. 464
Last Answer : c. 464