问题 填空题

通信控制处理机可作为通信子网中的______,完成分组的接收、校验、存储及转发等功能,实现将源主机报文准确发送到目的主机的作用。

答案

参考答案:组存储转发结点

解析: 通信控制处理机在网络拓扑结构中被称为网络结点。通信控制处理机一方面作为与资源子网的主机和终端的连接接口,将主机和终端连入网内。另一方面作为通信子网中的分组存储转发结点,完成分组的接收、校验、存储及转发等功能,实现将源主机报文准确发送到目的主机的作用。

阅读理解

Here is your best chance to travel around the UK in 2014: More than 200 B&Bs(bed & breakfast)across England, Scotland, Wales and Northern Ireland are chosen to offer you amazing services for your stay at their lowest prices! Don’t miss it. Just collect the vouchers(活动券)in our B&B Daily printed from 01/04/2014 to 07/04/2014 and book the stays for your travel following the terms and conditions below:

● The offer includes a room for the night and a breakfast the next morning.

● The offer is of two kinds: £20 per room, valid(有效的)during stay period of 02/04/2014—31/05/2014 and then again 01/09/2014—31/10/2014;£35 per room, per night, valid during stay period of 01/06/2014—31/08/2014.

● The offer is valid for a basic twin or double room only.

● The stay must be booked directly with the chosen B&Bs before 28/04/2014.

● Each voucher can only be used by the holder to book one room for one night.

● If voucher holders book either the £20 or £35 per room per night, any additional(附加的) services such as lunch, evening meal or activities may require an extra charge. But these are not required in order to take up the offer. Please check directly with your chosen B&Bs to see what extra services are available.

● Vouchers must be presented(提交)on arrival. If no vouchers are presented, the B&Bs may reserve(保留)the right(权利)to charge(收费)at full price for every night of stay.

● Vouchers may not be used together with any other offer.

● The voucher holders must pay for the stay in full at the time of booking. Additional £10 may be paid to confirm the booking and will be returned on arrival.

● The B&Bs reserve the right to refuse voucher holders’ bookings for people under the age of 18.

小题1:The voucher can be used for a stay at the chosen B&B on ______.

A.09/01/2014

B.04/02/2014

C.01/03/2014

D.28/04/2014小题2:How much should be paid for a two-night stay in October 2014 at a chosen B&B?

A.£70

B.£40

C.£35

D.£30小题3:What right do the B&Bs reserve?

A.To charge another £10 for bookings with no vouchers.

B.To refuse bookings for guest under the age of 18.

C.To charge at full price for stays which are not confirmed.

D.To request extra charges as tips.小题4:By taking up the offer, the voucher holders can choose to ______ .

A.book either a basic twin or double room at the chosen B&Bs

B.have lunch or evening meal without paying extra money

C.use the B&B offer together with other offers

D.book the stays through B&B Daily

解答题