Data Communications 2 Test 5

Question 26. What data rate is available from an ISDN Basic Rate Interface (BRI)?

a) 2 B channels and a D channel, a total of 2* 64,000 + 8,000 bit/s, that is 136,000 bit/s..
b) Either 64,000 or 128,000 bit/s depending on the use of channel aggregation..
c) 30 B Channels (24 in the USA), each of 64,000 bit/s.
d) 64,000 bit/s.

Right or wrong? . You took tries.

Question 27. Narrow-band ISDN or N-ISDN is:

a) Not suitable for any sort of video-conferencing.
b) Provided either as a basic rate or a primary rate service.
c) A name for low data rate ATM services.
d) A term that is not used any more.

Right or wrong? . You took tries.

Question 28. For most people working from home, the problem with using ISDN is::

a) It is only available to commercial subscribers.
b) Specialised routers are needed, ones with ISDN interfaces, some Unix work stations have them, but not many of those are used at homes.
c) ISDN services are not availabe in all areas of all OECD countries.
d) The cost makes it totally unsuitable for private use.

Right or wrong? . You took tries.