Computer Networking How often are BPDUs sent from a layer 2 device? Every 30 seconds Every 10 minutes Every 2 seconds Never Every 30 seconds Every 10 minutes Every 2 seconds Never ANSWER DOWNLOAD EXAMIANS APP
Computer Networking Which of the following refers to the terms "residual error rate"? the probability that one or more errors will be detected when an error detection mechanism is used None of these The probability that one or more errors will be undetected when an error detection scheme is used signal to noise ratio divided by the ratio of energy per bit to noise per hertz the number of bit errors per twenty four hours of continuous operation on an asynchronous line the probability that one or more errors will be detected when an error detection mechanism is used None of these The probability that one or more errors will be undetected when an error detection scheme is used signal to noise ratio divided by the ratio of energy per bit to noise per hertz the number of bit errors per twenty four hours of continuous operation on an asynchronous line ANSWER DOWNLOAD EXAMIANS APP
Computer Networking Which of the following technique is used for allocating capacity on a satellite channel using fixed-assignment FDM? Frequency-shift keying Amplitude modulation Frequency-division multiple access Frequency modulation None of these Frequency-shift keying Amplitude modulation Frequency-division multiple access Frequency modulation None of these ANSWER DOWNLOAD EXAMIANS APP
Computer Networking The Token-Ring architecture was developed for a more efficient way to determine who should be transmitting at any one time. With Ethernet, collisions may take place, causing the transmitting computers to have to retransmit their data. The use of token guarantees that only one computer can transmit at a time. What happens as the network increases in size? Choose the best answer The speed of the Token-Ring network must be 16Mbps if the number of nodes is greater then 500 The network becomes less efficient The network becomes more efficient An additional token is added for every 1,000 nodes After the number of nodes exceeds 550, the Multistation Access Unit must be replaced by the more powerful Hyperstation Unified Bandwidth device The speed of the Token-Ring network must be 16Mbps if the number of nodes is greater then 500 The network becomes less efficient The network becomes more efficient An additional token is added for every 1,000 nodes After the number of nodes exceeds 550, the Multistation Access Unit must be replaced by the more powerful Hyperstation Unified Bandwidth device ANSWER DOWNLOAD EXAMIANS APP
Computer Networking The transfer of data from a CPU to peripheral devices of a computer is achieved through buffer memory None of these modems interfaces computer ports buffer memory None of these modems interfaces computer ports ANSWER DOWNLOAD EXAMIANS APP
Computer Networking Which of the following allows a simple email service and is responsible for moving messages from one mail server to another? FTP DHCP IMAP SMTP POP3 FTP DHCP IMAP SMTP POP3 ANSWER DOWNLOAD EXAMIANS APP
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