1. Networking Exercise Short Questions
1. (a) 試舉出常用於寬廣區域網絡而非局部區域網絡的兩種通訊科技。
State two kinds of communication technology that are usually used in a WAN instead of a
LAN.
(b) 試舉出局部區域網絡的兩個實例。
State two real-life examples of LANs.
(c) 試舉出寬廣區域網絡的兩個實例。
State two real-life examples of WANs.
2. (a) 與對等網絡比較，試舉出客戶 / 伺服網絡的兩個優點和兩個缺點。
State two advantages and two disadvantages of client/server networks over peer-to-peer
networks.
(b) 試舉出可以把電腦連接成局部區域網絡的兩種網絡設備。
State two networking devices that can interconnect computers to form a LAN.
P. 1

2. 3. (a) 試舉出可以被電腦網絡共享的三種資源。
State three types of resources that can be shared by a computer network.
(b) 除了資源共享外，試舉出電腦網絡的另一個重要功能。
Apart from resource sharing, state another important function of a computer network.
(c) 試舉出常用於局部區域網絡的兩種傳輸媒體。
State two transmission media that are commonly used in a LAN.
4. (a) (i) 一些網絡界面卡（NIC）設有 BNC 連接埠。哪種電纜可以連接到這種連接埠？
Some network interface cards (NICs) are equipped with BNC ports. What kind of
cables can be connected to this port?
(ii) 試舉出另一種在大部分網絡界面卡上設有的連接埠。
State another port that is present in most NICs.
(b) 試舉出兩類擴充總線，從而允許某些網絡界面卡連接以下的各類電腦：
State two kinds of expansion bus that allow certain kinds of NICs to be connected to each
of the following types of computers:
(i) 桌上電腦 Desktop computers
(ii) 筆記簿型電腦 Notebook computers
P. 2

3. 5. (a) 試舉出媒介接達控制（MAC）位址的另外兩個名稱。
State two other names of MAC address.
(b) 試舉出 MAC 位址的兩個特性。
State two characteristics of MAC address.
(c) 試舉出包含 MAC 位址的兩種網絡設備。
State two networking devices that possess MAC addresses.
6. (a) (i) 試舉出兩種雙扭線電纜。
State two kinds of twisted-pair cables.
(ii) 在 (a) (i) 部分所提及的兩種雙扭線電纜的主要區別是甚麼？
What is the main difference between the two kinds of twisted-pair cables mentioned
in part (a) (i)?
(iii) 在 (a) (ii) 部分所提及的區別有甚麼重要性？
What is the significance brought by the difference mentioned in part (a) (ii)?
(b) 除了在 (a) (i) 部分提及的電纜外，試舉出另外兩種網絡電纜。
State two kinds of networking cables other than the ones mentioned in part (a) (i).
P. 3

4. 7. (a) 與無線網絡比較，試舉出有線網絡的兩個優點和兩個缺點。
State two advantages and two disadvantages of wired networks over wireless networks.
(b) 試就下列參數比較 802.11b 和 802.11g，哪項標準的數值較高？
Regarding 802.11b and 802.11g standards, which one has a higher value in terms of the
following parameters?
(i) 數據傳輸速度 Data transmission speed
(ii) 射頻頻率 Radio frequency
8. (a) (i) ADSL 是一種在香港很常用的寬頻科技。然而它也有一些問題，試舉出其中一
種問題。
ADSL is a type of popular broadband technology in Hong Kong. However, it has
some problem. State one of the problems of this technology.
(ii) 試舉出在香港使用的另外兩種寬頻科技。
State two other kinds of broadband technology available in Hong Kong.
(b) 試舉出一種可以用於專線的通訊科技。
State one kind of communication technology that is used for leased lines.
(c) 除了無線局部區域網絡以外，試舉出另外兩種無線科技。
Except wireless LAN, state two other kinds of wireless technology.
P. 4

5. 9. 某銀行在一個國家的不同地區內設立了數百家分行，每家分行有各自的網絡。這些網絡
連接起來形成一個大型網絡，即銀行系統。
A bank has hundreds of branches in different locations in a country. Each branch has its own
network. All these networks are connected together to form a big network, hence a banking
system.
(a) 各分行的網絡屬於甚麼類型的網絡？
Suggest the type of network for each branch.
(b) 試為分行網絡建議一種網絡電纜。
Suggest one type of network cables for the branch network.
(c) 試為由分行網絡連接而成的大型網絡建議一種網絡電纜。
Suggest one type of network cables for connecting the branch networks into a big
network.
(d) 該大型網絡屬於甚麼類型的網絡？
Which type of network is the big network?
(e) 試舉出兩種可能在該銀行系統中使用的網絡服務。
Give two network services that may be used in the banking system.
P. 5

6. 10. (a) 根據開放系統互連（OSI）模型，完成下表。
With reference to the OSI model, fill in the diagram below.
應用層 (i) 話路層 (ii) 網絡層 (iii) (iv)
Application Session Network
(i)
(ii)
(iii)
(iv)
(b) 試列出應用層使用的兩種協定。
State two examples of protocols that are used in the application layer.
11. (a) 數據在經電腦網絡發送前，會先被分割成多個數據包，在經過開放系統互連（OSI）
模型的七層時，會再細分為多個數據塊。試完成下表。
A data file is divided into packets which are then formed into different kinds of data
blocks when it passes through the seven layer of OSI models before being sent on a
computer network. Complete the following table.
OSI 模型的通訊層 數據塊
OSI Model Layer Data Block
傳輸層 (i)
Transport
網絡層 (ii)
Network
數據鏈路層 (iii)
Data Link
(b) 表中各層接收到數據塊後，會在該數據塊加入一個項目。試列出表中各層所加入的
各個項目。
State one item that will be added into the data blocks on each layer in the above table
when the layer has received the data blocks.
(i)
(ii)
(iii)
P. 6

7. 12. (a) 為甚麼數據檔案需要分成數據塊來傳送？試舉出兩個原因。
Why are data files divided and sent in data blocks? State two reasons for this.
(b) (i) 哪層負責將數據檔案分割為數據報？
Which layer is responsible for dividing data files into datagrams?
(ii) 試指出在(b)(i)部分所提及的層上工作的一種協定。
State one protocol that works on the layer mentioned in part (b)(i).
13. (a) 哪種協定套適合在互聯網上傳送文件檔案？
What is the protocol suite for a document file transferring on the Internet?
(b) 除(a)部分提出的協定套外，還有其他可用的協定套。試舉出其中一種協定套及該協
定套的一種應用。
Apart from the protocol suite mentioned in part (a), there are other protocol suites
available. State one of them and one application using this protocol suite.
(c) 試比較 (a) 部分和 (b) 部分的協定套，舉出後者相對於前者的一個優點和一個缺
點，並解釋為何 (b) 部分的協定套較適合用於題中的應用。
State one advantage and one disadvantage of the protocol suite mentioned in part (b) over
that mentioned in part (a). Explain why the protocol suite in part (b) is more suitable for
the application mentioned.
P. 7

8. 14. (a) 試完成以下與通訊種類有關的表。
Complete the following table about different types of communications.
通訊種類 傳輸信息種類
Type of communication Type of message transmitted
(i) 一對多的即時信息
One-to-many instant messages
(ii) 實時的流式音頻信息
Real-time streamed audio messages
(iii) 實時的流式視像信息
Real-time streamed video messages
(b) 有哪些軟件可常用來檢視 (a)(i) 部分所提及的信息？試舉出其他兩種通訊方式，用
作檢視 (a)(i) 部分所提及的信息。
What kind of software is commonly used to view the messages mentioned in part (a)(i)?
State two other types of communication which can also be used to view the type of
messages mentioned in part (a)(i).
15. (a) 試簡述在接收方的數據鏈路層接收到檔案幀之後的情況。
Describe briefly what will happen on the data link layer in the receiver side when the
frames of a file are received.
(b) 經過 (a) 部分的過程後，在接收方的網絡層會出現甚麼情況？
After the process in part (a), what will happen on the network layer in the receiver side?
(c) 經過 (b) 部分的過程後，在接收方的傳輸層會出現甚麼情況？
After the process in part (b), what will happen on the transport layer in the receiver side?
P. 8

9. 16. 完成以下與 IP 位址分級有關的表。
Complete the following table regarding the classification of IP addresses.
每個網址可供使用的主機數目
級別 在二進制中首個八位字節的起始數字
Number of hosts available for each
Class First octet (in binary) begins with
network address
A
B
C
17. (a) 每個網域名稱的最後一組字符可分為哪兩類不同的網域名稱？試就每類網域名稱各
舉出一個例子。
With respect to the last group of characters of every domain name, there are two types of
domain names. What are they? State one example for each type of domain names.
(b) 試列出網絡名稱與下列各項的關係。
State the relationship between domain names and
(i) 劃一資源定位 URL.
(ii) 網域名稱系統伺服器 DNS Servers.
P. 9

10. 18. 試判斷下列 IP 位址是否有效。若否，試扼要解釋你的答案。
Determine whether the following IP addresses are valid. If not, explain your answer briefly.
(a) 202.81.105
(b) 202.81.265.105
(c) 155.21.105.65.201
19. (a) 試描述以下網域名稱所提供的信息。
Describe the information given by each of the following domain names.
(i) www.hku.edu.hk
(ii) www.gov.cn
(b) 小明希望透過互聯網存取 SONY 公司在中國的網站。可是，他不知道該網站的網域
名稱。試為小明建議一個可嘗試輸入網頁瀏覽器的網域名稱。
Siu Ming wants to access the web site of the SONY Company in China through the
Internet. However, he does not know the domain name of the web site. What domain
name would you suggest him to key in the web browser for trial?
P. 10

11. 20. (a) 網域名稱的功能是甚麼？
What is the function of a domain name?
(b) 網域名稱系統的功能是甚麼？
What is the function of a domain name system?
(c) 一個網站是否可以只有 IP 位址，而沒有網域名稱？試扼要解釋。
Is it possible that a web site has IP address only but no domain name? Explain your
answer briefly.
(d) 一個網站是否可以只有網域名稱，而沒有 IP 位址？試加以解釋。
Is it possible that a web site has domain name only but no IP address? Explain your
answer briefly.
P. 11

12. 21. 試辨別下列各活動是由傳輸控制協定或是由互聯網協定進行。
Determine whether each of the following activities is performed by TCP or IP.
(a) 為數據包加上目的地位址。Add address of the destination to packets.
(b) 為每個數據包加上序號。Associate a number with each packet.
(c) 把數據檔案分拆成數據包。Disassemble data files into packets.
(d) 把數據包重組成數據檔案。Reassemble packets into data files.
(e) 從數據包上移除目的地位址。Remove the address of the destination from the packets.
(f) 為數據包選擇路徑並傳送至目的地。Route the packets to the destination.
22. 舉出搜尋器的三個主要部分，並描述每個部分的主要功能。
State three main components of a search engine. Describe the main functions of each of them.
P. 12

13. 23. (a) FTP 的主要功能是甚麼？
(b) 舉出 FTP 傳輸中所涉及兩個角色。
(c) 描述以匿名身份從 FTP 伺服器下載檔案的兩個特點。
24. 完成下表，說明如何在一般搜尋器上使用符號或運算符。
符號 / 運算符 描 述
Symbol/Operator Description
必須包含運算符前後的關鍵字。
The keywords before and after the operator must be included.
必須不包含運算符後的關鍵字。
The keywords after the operator are not included.
必須包含運算符前或運算符後的關鍵字。
Either the keywords before or the one after the operator must be included.
*
“….”
-
P. 13

14. 25. 就以下各方面，舉出傳統商貿和電子商貿的區別：
State the major difference between conventional commerce and e-commerce regarding the
following aspects:
(a) 廣告 Advertisement
(b) 下訂單 Placing Order
(c) 交易地點 Place of Transaction
26. (a) 與傳統商貿相比，舉出電子商貿對賣方而言的兩個優點和兩個缺點。
State two advantages and two disadvantages of e-commerce over conventional commerce
for sellers.
(b) 與傳統商貿相比，舉出電子商貿對買方而言的一個優點和一個缺點。
State one advantage and one disadvantage of e-commerce over conventional commerce
for buyers.
P. 14

15. 27. (a) 與傳統的課堂學習相比，舉出電子學習的三個優點和一個缺點。
State three advantages and one disadvantage of e-learning over conventional classroom
learning.
(b) 舉出兩種網上娛樂。
State two kinds of online entertainment.
28. (a) 舉出電子郵件較傳統郵件優勝的三個地方。
State three advantages of e-mails over traditional postal mails.
(b) 描述視像流式傳輸的意義。
Describe the meaning of video streaming.
(c) 指出外掛程序的功能。
State the function of a plug-in?
P. 15

16. 29. (a) 下圖顯示了郵件伺服器的操作。在空格 X 和 Y 中填上「接收郵件伺服器」和「發送
郵件伺服器」。
The following diagram shows the operations of mail servers. Fill in the boxes X and Y
with ‘incoming mail server’ or ‘outgoing mail server’.
寄件人 收件人
互聯網
Sender X Y Receiver
Internet
(b) 就下列的郵件伺服器，各舉出一個協定：
State one protocol for each of the following mail servers:
(i) 接收郵件伺服器 Incoming mail server
(ii) 發送郵件伺服器 Outgoing mail server
(c) 與互聯網服務供應商所提供的電子郵件相比，舉出網絡郵件的兩個缺點。
State two disadvantages of webmails over e-mails provided by ISPs.
P. 16

17. 30. 大智中學有學生 1,000 名。學校設立了一個電子學習平台。學習平台以網頁作為界面，
學生可利用網頁瀏覽器在家中經互聯網登入該平台。在登入後，學生可選擇適合自己的
科目，並可下載與所選科目相關的筆記或演示。所有筆記或演示檔案均以 PDF 格式寄存。
There are 1,000 students in Intelligence Secondary School. The school has set up an e-learning
platform which uses web pages as the interface. Each student can use a web browser to log in
the platform through the Internet. After logging in, students can choose the suitable subjects by
themselves and download the notes and presentation files related to the selected subjects. All
the notes or presentation files are hosted in PDF format.
(a) 寫出筆記以 PDF 格式寄存而非 DOC 格式寄存的一項優點。
State one advantage of hosting the notes in PDF format instead of DOC format.
(b) 除了貯存筆記和演示外，寫出三項電子學習平台可加設的功能。
Except storing the notes and presentation files, state three additional functions of
e-learning platform.
(c) 與傳統的課堂教學比較，寫出電子學習的一項優點和一項缺點。
Comparing with the traditional teaching in class, state one advantage and one
disadvantage of e-learning.
P. 17