CRC delimiter must be recessive (1). ACK – Recessive bit is sent by transmitter, node receiving correct message writes this recessive bit in original message with a dominant bit, which is indication there is no error. If node receiving message detects error then it leaves this bit recessive, message is discarded and the sending node repeats the message after re-arbitration. In this way, each node acknowledges the integrity of thae data. ACK is of 2 bits, first is acknowledgment bit and the second is delimiter which is always
The SIFS( Shortest Inter-Frame Space),derives the time between the last transmission and high priority transmissions such as positive acknowledgments(ACKs),Clear-To-Send(CTS)frames,polling responses, continuation frames in a burst transmission. priority is given to the positive ACK frames so that a station which has just completed the reception of a frame can give immediate feedback to the sender. RTS and CTS frame coordinate correspondence between sets of stations so that different stations know not the medium to be free for the time of the exchange .This is one of the reasons for why the control frames have priority over normal data transmissions. If a station finished transmitting a frame and has enough time left to send an additional frame, it is allowed to send after a SIFS.
The file organization which allows us to read records that would fulfill the join condition by using one block read is a) Heap file organization b) Consecutive file organization c) Clustering file organization d) Hash file organization Answer: c 34. What are the exact features of a distributed database? a) Is always connected to the internet b) Always requires more than three machines c) Users see the data in one global schema. d) Have to require the physical location of the data when an update is done
When FreeFlyer sends a checkout request for a license, the master responds and then serves the license to the client system. If the master server fails, whether due to hardware failure, loss of network connection, or something else, the secondary license server becomes the master and will then serve licenses to client systems. If both the primary and secondary license servers go down, licenses will no longer be served to FreeFlyer users until at least two of the three license servers are up and running again. More information about the mechanics of three-server redundant systems can be found in the FlexNet License Administration guide referenced at the end of this
It corresponds to nodes that disconnect from current cluster and move to another cluster. Here the idea reflects on the cluster head election, to consider relative mobility to select stable cluster head. In WCA, the running average speed for every node till current time T is computed as follows (1) where (Xt, Yt) and (Xt – 1, Yt – 1) are the coordinates of the node ‘i’ at time ‘t’ and ‘(t – 1)’ respectively. This value is an indication of the absolute mobility of a node and it does not provide any information about the stability between a node and its neighbours, i.e, the relative stability. The novelty of the Proposed Trust Based Weighted Clustering Algorithm is that, it has taken into account the node’s relative mobility with the help of stability factor and trust value so as to identify a stable trusted node as the cluster-head, and thus reduces the number of reaffiliations which has not been actually done in
1- A caller contacts a master server, and signals that they would like to establish a call with a responder. 2- The responder receives an encrypted signal, connects to the master server, and indicates that it has received the call signal. 3- If the responder chooses to answer the call, then it is relayed through the closest available relay server.
Data Communication protocols are formal descriptions of data formats and rules in which the more than one system exchanges data /information. The protocols cover various issues such as authentication, error detection and correction. Popular network communications protocols used are the TCP/IP and User Datagram Protocol (UDP), while TCP is connection oriented once a connection is established, UDP connectionless Internet protocol. The model for information exchange includes the data source which generates the data to be transmitted, Transmitter which converts the data into transmittable signals, Transmission system which carries the data, Receiver which converts received signals into data and Destination which takes incoming data. TCP/IP uses
In the time space, the excitation and trade limit are convolved to make the yield voice signal. As showed up in the figure underneath, we can put the first banner through the channel to get the excitation part. Putting the excitation part through the converse channel (1/A(z)) gives us the first banner back. We can perform voice change by supplanting the excitation part from the given speaker with another. Since we are up 'til now using the same trade limit A(z), the resulting talk test will have the same voice quality as the first.
As soon as they try to run them, the windows will return ‘not a valid windows image’ error and this only be solved with the help of a proper tool of error rectification. Sometimes the some users are not able to install certain applications as whenever they try to so, it will returned and error message that told the application could not be installed as the procedure entry is not found. All these and a number of other issues are best solved by the DLL Suite the product of VSKSoft, which is designed to take on these types of taskcomp.dll related
Answer 16: Frame relay would automatically assume that fiber-optics will be used and there will be no errors. It uses the do nothing form of error control. Answer 17: One packet can be sent using Stop-and-wait protocol at one time. Answer 18: The ACK in Stop-and-wait protocol acknowledges that there have been no errors during transmission of data. Answer 19: NAK functions opposite to how ACK functions and reacts when there is an error during transmission.
FTP can use authentication and all data is sent in clear text. TFTP doesn’t support user authentication and sends all data in clear text. HTTP 1.0 HTTP 1.1 It is defined by RFC 1945. It is defined by RFC 2616. HTTP 1.0 could only define up to 16 status codes which results in poor resolution and has some limitations.
Assessment 3 – Assignment 1 Student Name: John Matanisiga Student ID No: S11124727 1. The difference between these wireless encryption is that WEP is wired equivalent privacy, a default procedure for wired security networks, WPA is an upgrade from WEP, and it is a wireless protected access to networks, whereas WPA2 is modernized into a more secure Wi-Fi from WPA. 2. With Static addressing, a computer (or other device) is configured to always use the same IP address, whereas dynamic addressing, the IP address can change periodically and is managed by a centralized network service. 3.