1 / 5   Error detection at the data link level is achieved by?

Cyclic Redundancy codes Hamming codes Bit stuffing Equalization

2 / 5   In which connection, two and only two devices are connected by a dedicated link?

point-to-point multipoint primary secondary

3 / 5   Which layer of OSI determines the interface of the system with the user?

Application Network Data-link Session

4 / 5   On a class B network, how many subnets are available with a subnet mask of 248?

30 6 2 62

5 / 5   Which part of the computer is used for calculating and comparing?

ALU Control unit Disk unit Modem