How does a host on an Ethernet LAN know when to transmit after a collision has occurred? In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously. In a CSMA/CD collision domain, stations must wait until the media is not in use before transmitting. You can improve the CSMA/CD network by adding more hubs. After a collision, the station that detected the collision has first priority to resend the lost data. After a collision, all stations run a random backoff algorithm. When the backoff delay period has expired, all stations have equal priority to transmit data.
An intrusion detection system does not perform which of the following?
Options: Tries to identify attempts to hack into a computer system., May monitor packets passing over the network., May transmit message packets to the correct destination., Set up deception systems that attempt to trap hackers.
When two computers communicate with each other, they send information back and forth. If they are separated by a reasonable distance, they can send and receive the information through a direct cable connection which is called a null-modem connection. Presently what is the maximum distance in metres permitted in this null-modem connection?
Options: is a hardware memory device which denotes the location of the current instruction being executed., is a group of electrical circuits (hardware), that performs the intent of instructions fetched from memory., contains the address of the memory location that is to be read from or stored into., contains a copy of the designated memory location specified by the MAR after a "read" or the new contents of the memory prior to a "write".
Options: making the programmers understand how the system will function., communicating to the user, quickly, how the system, when developed, will look like and get a feedback., giving a demo of the software, to the system manager to whom he reports, both (a) and (b)
Options: describes how data are structured in the data base, specifies for the DBMS what is required; the techniques used to process data, determine how data must be structured to produce the user's view, All of the above
Ethernet networks can be cabled in a number of topologies, depending on what works best in each environment. As more nodes are added, the efficiency of Ethernet decreases. Select the best answer as to why Ethernet becomes less efficient as size increases.
Options: Network collisions occur, Repeaters cannot increase the signal strength sufficiently, Cable terminators do not reflect the signal properly, Cable terminators do not absorb the signal properly
PROLOG is an AI programming language which solves problems with a form of symbolic logic known as predicate calculus. It was developed in 1972 at the University of Marseilles by a team of specialists. Can you name the person who headed this team?
Options: Alain Colmerauer, Nicklaus Wirth, Seymour Papert, John McCarthy