> Hi, gurus,
> Here is some questions I doubt the answer :
> 1.I've seen a question ask "what is the preferal way to segment the LAN,
> using router,
> bridge or switch ?", I doubt is using router but not sure, what is your
None of the above. Or all of the above. I don't think you'll see a
like that on the test. It's too ambiguous to have an answer. Whether you
segment with a router, bridge, or switch depends on a ton of factors.
Quote:> 2.what 's the routing type of IS-IS? one question's answer say it is
> link-state routing
> protocol, but I think ICRC book say it is hybrid, which is right ?
It definitely has link state features, but OSI is not my specialty. With
somebody else will answer this one for you.
Quote:> 3.one question's answer is "the packet will 'die' when it reaches the
> terminator", while
> the other satatement "the packet will time out" is not true, I think "
> time out " is the
> same thing with "die when reach terminator",am I right ?
No. From the two options, it sounds like you are looking at an ethernet
question. "Die with it reaches the terminator" means that when the frame
hits the end of the coax, it hits a terminator. A terminator is basically a
resistor that is balanced to the impedance of the cable. What that means
is that the electrical impulses that make up your frame go to zero. This
prevents the frame from reflecting from the end of the cable back to the
other devices. Think of it as a ground (or a dummy-load if you have any
Timing-out is based on either a timer or a counter. An IP packet header
has a TTL field used as a counter to determine when the packet times out.
> thanks in advance!!!!!!!!!!!
> Li Song
> Homepage: http://dcb.hz.zj.cn/lisong