On the topic of VLSM, which one of the following statements best describes the concept of the route aggregation?

A．Deleting unusable addresses through the creation of many subnets.

B．Combining routes to multiple networks into one supernet.

C．Reclaiming unused space by means of changing the subnet size.

D．Calculating the available host addresses in the AS.

E．None of the above

[单选题]When a teacher instructs the students to match the topic sentences with pro

[单选题]Which one of the following items would most likely result in a permanent di

[单选题]Which one of the following is NOT the reason for an overall lack of teaching Darwin's theory?A．Teaching of creationism diminishes teaching of evolution.B．Teachers are not required to teach Darwin's theory.C．teachers often leave out the teaching of

[单选题]Which one of the following describes the similarity between the stack and the queue?(75)A．logical characteristicsB．physical characteristicsC．operation methodD．element type

[单选题]Which one is NOT the cause of the generation gap?A． Young people like to choose their own lifestyles.B． American society is changing very fast.C． Parents place high hopes on their children.D． Modem education makes them think differently.

[单选题]Which one of these statements about connecting to the Internet is true? (68) .(68) A．The Internet can only be used to link computers with same operating systemB．The Internet can be used to connect computers with different ISPC．You must have a telepho

[单选题]_______control system is one in which the control action is independent of the output.A．Feed backB．Negative feed backC．Close loopD．Open loop

[单选题]Which one is the microwave plan tool？（）A . AtollB . ConnectC . AssetD . Plant

[单选题]Which one of the following expressions is equivalent to 'X BETWEEN 15 AND 25'?(75)A．X＞15 AND X＜25B．X=15 AND X=25C．X＞25 AND X＜15D．X＞=15 AND X＜=25

[单选题]29． Which one is wrong?A． Mike always puts his things away．B． Tom can mend the kite．C．Mike is not a careful boy．D． Mike's shoes are worn out