2009-7-27 P,1
Unit 17
The Internet
Chapter Four
&Part4 Extensive Reading@ Part 1 Notes to Text
@Part5 Notes to Passage& Part 2 Word Study
@Part3 Practice on Text @Part6 Practice on Passage
2009-7-27 P,2
@ Part 1 Notes to Text
1) This network of networks is used for an extraordinary range of
purposes --- long distance collaborations,retrieving free
software and documents,accessing library catalogs,logging in
to supercomputers,该网络的应用范围也特别广 —— 远距离合作、
检索免费软件和文档、查阅图书馆目录、登录到超级计算机上。
注释,破折号后面的 long distance collaborations,retrieving free
software and documents,accessing library catalogs,logging in
to supercomputers都是名词性短语，用作同位语，说明前面所提到的名词 purposes的具体内容。
2) In the Internet Passport,the Internet will be defined as the
network of networks which follow a set of rules known as the
"Internet Protocol (IP) suite",人们将因特网在它的证书中定义为网络群中的网络，该网络群遵循的是一套所谓的互联网协议集规则。
注释,注意定语从句 which follow a set of rules known as the
"Internet Protocol (IP) suite"中的关系代词 which指代的先行词是
networks而非 network，所以用的是复数谓语动词形式；过去分词短语 known as… 修饰 rules。
The Internet
2009-7-27 P,3
3) It means that any computer which is connected to the Internet
can communicate with any other Internet computer thanks to the
rules of IP,and that a message sent from one Internet computer
to another will get to the intended destination,这就意味着，有了 IP
协议的作用，任意一台连接到因特网上的计算机就可以与因特网上任何其它计算机进行通信联系；也意味着可以将信息从因特网上的一台计算机传送往另一台计算机上的信息，从而实现将信息送达指定地点之目的。
注释,短语 thanks to the rules of IP 作原因状语；谓语动词 means后面带了两个宾语从句：一是 that any computer which is connected
to the Internet can communicate with any other Internet computer,
其中 which is connected to the Internet为定语从句，修饰该从句的主语 any computer；另一个是 that a message sent from one
Internet computer to another will get to the intended destination，
其中 sent from one Internet computer to another 是过去分词短语作定语，修饰该从句的主语 a message。
2009-7-27 P,4
4） The Internet contains the electronic equivalents of conference
rooms and cafes,libraries and bookstores,post offices and
telephones,radio and television stations,newspaper and magazines,
and a growing variety of services that have no counterparts in "the
real world",如今因特网拥有了各种各样等同于电子的业务，如电子会议室和咖啡屋、电子图书馆和书店、邮政局和电话局、无线电台和电视台、报社和杂志社的电子业务，以及“现实世界”中尚未出现的各种业务。
注释,名词短语 the electronic equivalents和后面 of结构属于同位关系。
即 of后面所列举的那一连串的业务都是以电子的形式开展的。通称为“电子等同业务”。
5) These services have created a truly global village where people
communicate with each other not because they happen to live in the
same place,but because they share the same interests,这些服务已经形成了一个真正的地球村，人们在那里相互交流，但并非是因为碰巧住在一起，而是因为他们兴趣相投的缘故。
注释,主语 These services 指上文中提到的因特网所能提供的那些服务；
注意 where引导的定语从句中的连词短语 not because… but because…
的意思是“不是因为 … 而是因为 …,,是典型的原因状语。
End
2009-7-27 P,5 End
1,interconnect v,连接 11,Internet Protocol suite互联网协议集
2,sophisticated adj,复杂的 12,intended destination 指定的目的地
3,collaboration n,合作 13,perspective n,观点；角度
4,retrieve v,检索 14,equivalent n,等同物
5,incredibly adv,不可思议的 15,counterpart n,相对物；对口
6,distinctive adj,与众不同的 16,humble adj,低级的
7,internetwork n,网络互连 17,archive n,计算机档案库存储器
8,specialized adj,专门的 18,diverse adj,各种各样的
9,graph n,图形 19,essence n 本质，实质
10,the Internet Passport 入网证 20,profound adj,意义深远的
& Part 2 Word Study
2009-7-27 P,6
Task 1,Listening training
Dictation of some key words
Directions,You will hear some key words twice,most of which are taken from
the Word Study,Then finish the Crossword Puzzle,(See you book p,)
2,Dictation of some key expressions
Directions,You will hear some key expressions twice,most of which are
taken from this text,Then you are asked to complete the missing words.
@Part3 Practice on Text
1) possible future________________
2) _________________complex
3) __________software and hardware
4) ____________destination
5) electronic_____________
6) the _________of the Internet
applications
incredibly
distinctive
intended
equivalents
essence
2009-7-27 P,7
Read and Reply
Directions:Students are required to read aloud the whole text after
the teacher,Then give short answers to the following questions:
Task 2,Read,Write and Translate
An internet is a computer network which allows computers
with distinctive software and hardware to communicate,or
"internetwork",While the Internet is specific kind of internet
which is defined as the network of networks that follow a set
of rules known as the "Internet Protocol (IP) suite".
It is used for an extraordinary range of purposes,such as,
long distance collaborations,retrieving free software and
documents,accessing library catalogs,logging in to
supercomputers
We can use the Internet to access various of kinds of resources
and communicate with other people throughout the world.
c) What can we use the Internet for?
a) What is an internet and what is the Internet?
b) What is the network of networks used for?
2009-7-27 P,8
( )1) The list of current Internet activities and services is
large and the range of
possible future applications is limited,
( )2) Because it is in direct communication with satellites far
above us,it could even be said that the Internet is already
bigger than the Earth,
( )3) Many kinds of computers can be connected to an
internet,but each computer can not serve a specialized role,
not allowing an internet to offer a wide variety of services to
its users,
( )4) You can dial from your phone to any other phone on the
system no matter what kind of telephone you have; you
don’ t need to know the phone number of the person you
want to reach,
( )5) We can get various kinds of resources and
communicate with others so long as the computer is
connected with the Internet,no matter how cheap your
computer is.
Read and Judge
End
F
T
F
F
T
2009-7-27 P,9
Directions:Read the following short passage,Complete it by filling in the missing words.
A,information B,allowing C,networks D,worldwide E,message
F,Internet G,exchange H,address I,computers J,communicate
The Internet is a 1)_______ network of computers and computer
2)_______ that can 3)_______ with each other using the Internet
Protocol,Any computer on the 4)_______ has a unique IP 5)_______
that can be used by other computers to route 6)_______ to it,Hence,
any computer on the Internet can send a 7)_______ to any other
computer using its IP address,These messages carry with them the
originating computer's IP address 8)_______ for two-way
communication,In this way,the Internet can be seen as an 9)_______
of messages between 10)_______.
Read and Complete
End
D
C J
F H
A
E
B
G
I
2009-7-27 P,10
1)众所周知，因特网的功能和业务范围非常广泛，其将来的应用超出了我们的想象。 (imagination)
2)据说因特网已经比地球还大了。没有人能真正全部了解它。（ it is said
that… ）
3)幸亏有了因特网，无论身在何处，我们可以随时和人们交流。 (thanks to)
4)只要你连接因特网，你就可以访问遍及全世界的计算机上的资源。 (access)
5)人们可以相互交流，不是因为我们住在一起，而是因为有共同的兴趣。
（ not because…but because ）
Read and Translate
Directions:Put the following sentences into English,using the words or phrases given.
End
As we all know,the activities and services of the Internet are so
large that the future applications are beyond our imagination
It is said that the internet is already bigger that the earth and that
not a single person can really understand it,
Thanks to the Internet,we can communicate with people,no
matter where we are,
So long as your computer is connected to the Internet,you can
access the resources of thousands of computers throughout the world.
People can communicate with each other,not because they happen to
live in the same place,but because they share the same interests.
2009-7-27 P,11
Local Area Network
Local area data networks,normally referred to simply as
local area networks or LANs,are used to interconnect
distributed communities of computer-based DTEs
located within a single building or localized(使局部化 ) group
of buildings,For example,a LAN may be used to
interconnect workstations distributed around offices
within a single building or a group of buildings such as a
university campus,Alternatively,it may be used to
interconnect computer-based equipment distributed
around a factory or hospital complex(综合性建筑 ),Since all
the equipment is located within a single establishment(公司,企业 ),however,LANs are normally installed and
maintained by the organization,Hence they are also
referred to as private data networks．
&Part4 Extensive Reading
2009-7-27 P,12
The main difference between a communication path established
using a LAN and a connection made through a public data
network is that a LAN normally offers much higher data
transmission rates because of the relatively short physical
separations(间隔，距离 )involved,In the context of the ISO
Reference Model for OSI,however,this difference manifests
itself only at the lower network dependent layers,In many
instances the higher protocol layers in the reference model are
the same for both types of network．
Most wide area networks,such as the PSTN(公共电话交换网 ),use a
mesh(网状 )（ sometimes referred to as a network） topology
(拓扑结构 ),With LANs,however,the limited physical separation
of the subscriber DTEs allows simpler topologies to be
used,The four topologies in common use are star,bus,ring
and hub(集线器 )．
2009-7-27 P,13
The most widespread topology for LANs designed to function
(起 … 作用 )as data communication subnetworks(子网络 )for the
interconnection of local computer-based equipment is the
hub topology,which is a variation(变体,变种 )of the bus and
ring,Sometimes it is called hub/tree topology．
Two techniques have been adopted for use of the medium
access control in the LANs,They are carrier-sense-multiple-
access with collision(冲突 )detection（ CSMA／ CD）,for bus
network topologies,and control token(控制令牌 ),for use with
either bus or ring networks．
End
2009-7-27 P,14
@Part5 Notes to Passage
1)Local area data networks,normally referred to simply as
local area networks or LANs,are used to interconnect
distributed communities of computer-based DTEs located
within a single building or localized group of buildings.
局域数据网一般简称为局域网，通常是用来将分散在一幢楼宇内或建筑楼群范围内的基于计算机数据终端设备互连起来。
注释,过去分词短语 normally referred to simply as local area
networks or LANs 为插入语，进一步说明、解释前面所提到的
Local area data networks。注意该短语是动词短语 refer sth,as
sth.的被动结构形式；而 located within a single building和
localized group of buildings 均为过去分词短语作定语，修饰
distributed communities； DTEs= Data Terminal
Equipment(数据终端设备 )。
2009-7-27 P,15
2)The main difference between a communication path
established using a LAN and a connection made
through a public data network is that a LAN normally
offers much higher data transmission rates because of
the relatively short physical separations involved．用局域网方式建立的通信线路和通过公用数据网连接的线路两者的主要区别在于：局域网传输数据的速度通常要高得多，这是因为局域网连接的物理设备之间的距离相对来说较短。
注释,该句的主语是 The main difference，所以谓语动词用的是 is;介词短语 between a communication path … 是定语修饰主语；过去分词短语 established using a LAN和 made
through a public data network，分别修饰 a
communication path和 a connection；由 that 引导的从句是表语。 注意名词短语 the relatively short physical
separations involved的字面意思是“相对较短的相关物理间距”，这里其实指的就是“局域网连接的物理设备之间的距离相对较短”。
2009-7-27 P,16 End
3)The most widespread topology for LANs designed to function
as data communication subnetworks for the interconnection
of local computer-based equipment is the hub topology,
which is a variation of the bus and ring,应用最广的局域网拓扑结构，在本地计算机设备互连中起着数据通信子网络作用，这种结构是集线器拓扑结构。它是总线和环形拓扑结构的变体。
注释,该句的结构看似复杂，但其实简单。我们可以将其简化为：
The most widespread topology for LANs is the hub topology.
这样就简单了。至于其它成分，可以慢慢去梳理。如：过去分词短语 designed to function as… 用作定语修饰主语；其中不定式短语
to function as是目的状语，意思是“起 … 的作用”； which引导的是非限制性定语从句。
2009-7-27 P,17
1.Listening Challenge
Spot Dictation
Directions,The following passage will be heard 3 times,During the second time,you
are required to put the missing words or phrases in the numbered blanks according to
what you hear,The third time is for you to check your answers,Now the passage
begins.
The Transmission 1)_________ Protocol (TCP) is 2)______________
the core protocols of the Internet protocol suite,often simply
3)__________ as TCP/IP,Using TCP,applications on networked
hosts can 4)____________________ to one another,over which they
can exchange 5)_______________ using Stream Sockets,6)_______
the IP protocol the protocol guarantees reliable and in-order 7)
_____________ from sender to receiver,TCP also 8)______________
data for multiple connections by concurrent 9)_______________
(e.g.,Web server and e-mail server) running 10)_________________.
@Part6 Practice on Passage
End
Control one of
referred to
create connections
streams of data Unlike
delivery of data distinguishes
applications
on the same host
2009-7-27 P,18
End of this Unit
Unit 17
The Internet
Chapter Four
&Part4 Extensive Reading@ Part 1 Notes to Text
@Part5 Notes to Passage& Part 2 Word Study
@Part3 Practice on Text @Part6 Practice on Passage
2009-7-27 P,2
@ Part 1 Notes to Text
1) This network of networks is used for an extraordinary range of
purposes --- long distance collaborations,retrieving free
software and documents,accessing library catalogs,logging in
to supercomputers,该网络的应用范围也特别广 —— 远距离合作、
检索免费软件和文档、查阅图书馆目录、登录到超级计算机上。
注释,破折号后面的 long distance collaborations,retrieving free
software and documents,accessing library catalogs,logging in
to supercomputers都是名词性短语，用作同位语，说明前面所提到的名词 purposes的具体内容。
2) In the Internet Passport,the Internet will be defined as the
network of networks which follow a set of rules known as the
"Internet Protocol (IP) suite",人们将因特网在它的证书中定义为网络群中的网络，该网络群遵循的是一套所谓的互联网协议集规则。
注释,注意定语从句 which follow a set of rules known as the
"Internet Protocol (IP) suite"中的关系代词 which指代的先行词是
networks而非 network，所以用的是复数谓语动词形式；过去分词短语 known as… 修饰 rules。
The Internet
2009-7-27 P,3
3) It means that any computer which is connected to the Internet
can communicate with any other Internet computer thanks to the
rules of IP,and that a message sent from one Internet computer
to another will get to the intended destination,这就意味着，有了 IP
协议的作用，任意一台连接到因特网上的计算机就可以与因特网上任何其它计算机进行通信联系；也意味着可以将信息从因特网上的一台计算机传送往另一台计算机上的信息，从而实现将信息送达指定地点之目的。
注释,短语 thanks to the rules of IP 作原因状语；谓语动词 means后面带了两个宾语从句：一是 that any computer which is connected
to the Internet can communicate with any other Internet computer,
其中 which is connected to the Internet为定语从句，修饰该从句的主语 any computer；另一个是 that a message sent from one
Internet computer to another will get to the intended destination，
其中 sent from one Internet computer to another 是过去分词短语作定语，修饰该从句的主语 a message。
2009-7-27 P,4
4） The Internet contains the electronic equivalents of conference
rooms and cafes,libraries and bookstores,post offices and
telephones,radio and television stations,newspaper and magazines,
and a growing variety of services that have no counterparts in "the
real world",如今因特网拥有了各种各样等同于电子的业务，如电子会议室和咖啡屋、电子图书馆和书店、邮政局和电话局、无线电台和电视台、报社和杂志社的电子业务，以及“现实世界”中尚未出现的各种业务。
注释,名词短语 the electronic equivalents和后面 of结构属于同位关系。
即 of后面所列举的那一连串的业务都是以电子的形式开展的。通称为“电子等同业务”。
5) These services have created a truly global village where people
communicate with each other not because they happen to live in the
same place,but because they share the same interests,这些服务已经形成了一个真正的地球村，人们在那里相互交流，但并非是因为碰巧住在一起，而是因为他们兴趣相投的缘故。
注释,主语 These services 指上文中提到的因特网所能提供的那些服务；
注意 where引导的定语从句中的连词短语 not because… but because…
的意思是“不是因为 … 而是因为 …,,是典型的原因状语。
End
2009-7-27 P,5 End
1,interconnect v,连接 11,Internet Protocol suite互联网协议集
2,sophisticated adj,复杂的 12,intended destination 指定的目的地
3,collaboration n,合作 13,perspective n,观点；角度
4,retrieve v,检索 14,equivalent n,等同物
5,incredibly adv,不可思议的 15,counterpart n,相对物；对口
6,distinctive adj,与众不同的 16,humble adj,低级的
7,internetwork n,网络互连 17,archive n,计算机档案库存储器
8,specialized adj,专门的 18,diverse adj,各种各样的
9,graph n,图形 19,essence n 本质，实质
10,the Internet Passport 入网证 20,profound adj,意义深远的
& Part 2 Word Study
2009-7-27 P,6
Task 1,Listening training
Dictation of some key words
Directions,You will hear some key words twice,most of which are taken from
the Word Study,Then finish the Crossword Puzzle,(See you book p,)
2,Dictation of some key expressions
Directions,You will hear some key expressions twice,most of which are
taken from this text,Then you are asked to complete the missing words.
@Part3 Practice on Text
1) possible future________________
2) _________________complex
3) __________software and hardware
4) ____________destination
5) electronic_____________
6) the _________of the Internet
applications
incredibly
distinctive
intended
equivalents
essence
2009-7-27 P,7
Read and Reply
Directions:Students are required to read aloud the whole text after
the teacher,Then give short answers to the following questions:
Task 2,Read,Write and Translate
An internet is a computer network which allows computers
with distinctive software and hardware to communicate,or
"internetwork",While the Internet is specific kind of internet
which is defined as the network of networks that follow a set
of rules known as the "Internet Protocol (IP) suite".
It is used for an extraordinary range of purposes,such as,
long distance collaborations,retrieving free software and
documents,accessing library catalogs,logging in to
supercomputers
We can use the Internet to access various of kinds of resources
and communicate with other people throughout the world.
c) What can we use the Internet for?
a) What is an internet and what is the Internet?
b) What is the network of networks used for?
2009-7-27 P,8
( )1) The list of current Internet activities and services is
large and the range of
possible future applications is limited,
( )2) Because it is in direct communication with satellites far
above us,it could even be said that the Internet is already
bigger than the Earth,
( )3) Many kinds of computers can be connected to an
internet,but each computer can not serve a specialized role,
not allowing an internet to offer a wide variety of services to
its users,
( )4) You can dial from your phone to any other phone on the
system no matter what kind of telephone you have; you
don’ t need to know the phone number of the person you
want to reach,
( )5) We can get various kinds of resources and
communicate with others so long as the computer is
connected with the Internet,no matter how cheap your
computer is.
Read and Judge
End
F
T
F
F
T
2009-7-27 P,9
Directions:Read the following short passage,Complete it by filling in the missing words.
A,information B,allowing C,networks D,worldwide E,message
F,Internet G,exchange H,address I,computers J,communicate
The Internet is a 1)_______ network of computers and computer
2)_______ that can 3)_______ with each other using the Internet
Protocol,Any computer on the 4)_______ has a unique IP 5)_______
that can be used by other computers to route 6)_______ to it,Hence,
any computer on the Internet can send a 7)_______ to any other
computer using its IP address,These messages carry with them the
originating computer's IP address 8)_______ for two-way
communication,In this way,the Internet can be seen as an 9)_______
of messages between 10)_______.
Read and Complete
End
D
C J
F H
A
E
B
G
I
2009-7-27 P,10
1)众所周知，因特网的功能和业务范围非常广泛，其将来的应用超出了我们的想象。 (imagination)
2)据说因特网已经比地球还大了。没有人能真正全部了解它。（ it is said
that… ）
3)幸亏有了因特网，无论身在何处，我们可以随时和人们交流。 (thanks to)
4)只要你连接因特网，你就可以访问遍及全世界的计算机上的资源。 (access)
5)人们可以相互交流，不是因为我们住在一起，而是因为有共同的兴趣。
（ not because…but because ）
Read and Translate
Directions:Put the following sentences into English,using the words or phrases given.
End
As we all know,the activities and services of the Internet are so
large that the future applications are beyond our imagination
It is said that the internet is already bigger that the earth and that
not a single person can really understand it,
Thanks to the Internet,we can communicate with people,no
matter where we are,
So long as your computer is connected to the Internet,you can
access the resources of thousands of computers throughout the world.
People can communicate with each other,not because they happen to
live in the same place,but because they share the same interests.
2009-7-27 P,11
Local Area Network
Local area data networks,normally referred to simply as
local area networks or LANs,are used to interconnect
distributed communities of computer-based DTEs
located within a single building or localized(使局部化 ) group
of buildings,For example,a LAN may be used to
interconnect workstations distributed around offices
within a single building or a group of buildings such as a
university campus,Alternatively,it may be used to
interconnect computer-based equipment distributed
around a factory or hospital complex(综合性建筑 ),Since all
the equipment is located within a single establishment(公司,企业 ),however,LANs are normally installed and
maintained by the organization,Hence they are also
referred to as private data networks．
&Part4 Extensive Reading
2009-7-27 P,12
The main difference between a communication path established
using a LAN and a connection made through a public data
network is that a LAN normally offers much higher data
transmission rates because of the relatively short physical
separations(间隔，距离 )involved,In the context of the ISO
Reference Model for OSI,however,this difference manifests
itself only at the lower network dependent layers,In many
instances the higher protocol layers in the reference model are
the same for both types of network．
Most wide area networks,such as the PSTN(公共电话交换网 ),use a
mesh(网状 )（ sometimes referred to as a network） topology
(拓扑结构 ),With LANs,however,the limited physical separation
of the subscriber DTEs allows simpler topologies to be
used,The four topologies in common use are star,bus,ring
and hub(集线器 )．
2009-7-27 P,13
The most widespread topology for LANs designed to function
(起 … 作用 )as data communication subnetworks(子网络 )for the
interconnection of local computer-based equipment is the
hub topology,which is a variation(变体,变种 )of the bus and
ring,Sometimes it is called hub/tree topology．
Two techniques have been adopted for use of the medium
access control in the LANs,They are carrier-sense-multiple-
access with collision(冲突 )detection（ CSMA／ CD）,for bus
network topologies,and control token(控制令牌 ),for use with
either bus or ring networks．
End
2009-7-27 P,14
@Part5 Notes to Passage
1)Local area data networks,normally referred to simply as
local area networks or LANs,are used to interconnect
distributed communities of computer-based DTEs located
within a single building or localized group of buildings.
局域数据网一般简称为局域网，通常是用来将分散在一幢楼宇内或建筑楼群范围内的基于计算机数据终端设备互连起来。
注释,过去分词短语 normally referred to simply as local area
networks or LANs 为插入语，进一步说明、解释前面所提到的
Local area data networks。注意该短语是动词短语 refer sth,as
sth.的被动结构形式；而 located within a single building和
localized group of buildings 均为过去分词短语作定语，修饰
distributed communities； DTEs= Data Terminal
Equipment(数据终端设备 )。
2009-7-27 P,15
2)The main difference between a communication path
established using a LAN and a connection made
through a public data network is that a LAN normally
offers much higher data transmission rates because of
the relatively short physical separations involved．用局域网方式建立的通信线路和通过公用数据网连接的线路两者的主要区别在于：局域网传输数据的速度通常要高得多，这是因为局域网连接的物理设备之间的距离相对来说较短。
注释,该句的主语是 The main difference，所以谓语动词用的是 is;介词短语 between a communication path … 是定语修饰主语；过去分词短语 established using a LAN和 made
through a public data network，分别修饰 a
communication path和 a connection；由 that 引导的从句是表语。 注意名词短语 the relatively short physical
separations involved的字面意思是“相对较短的相关物理间距”，这里其实指的就是“局域网连接的物理设备之间的距离相对较短”。
2009-7-27 P,16 End
3)The most widespread topology for LANs designed to function
as data communication subnetworks for the interconnection
of local computer-based equipment is the hub topology,
which is a variation of the bus and ring,应用最广的局域网拓扑结构，在本地计算机设备互连中起着数据通信子网络作用，这种结构是集线器拓扑结构。它是总线和环形拓扑结构的变体。
注释,该句的结构看似复杂，但其实简单。我们可以将其简化为：
The most widespread topology for LANs is the hub topology.
这样就简单了。至于其它成分，可以慢慢去梳理。如：过去分词短语 designed to function as… 用作定语修饰主语；其中不定式短语
to function as是目的状语，意思是“起 … 的作用”； which引导的是非限制性定语从句。
2009-7-27 P,17
1.Listening Challenge
Spot Dictation
Directions,The following passage will be heard 3 times,During the second time,you
are required to put the missing words or phrases in the numbered blanks according to
what you hear,The third time is for you to check your answers,Now the passage
begins.
The Transmission 1)_________ Protocol (TCP) is 2)______________
the core protocols of the Internet protocol suite,often simply
3)__________ as TCP/IP,Using TCP,applications on networked
hosts can 4)____________________ to one another,over which they
can exchange 5)_______________ using Stream Sockets,6)_______
the IP protocol the protocol guarantees reliable and in-order 7)
_____________ from sender to receiver,TCP also 8)______________
data for multiple connections by concurrent 9)_______________
(e.g.,Web server and e-mail server) running 10)_________________.
@Part6 Practice on Passage
End
Control one of
referred to
create connections
streams of data Unlike
delivery of data distinguishes
applications
on the same host
2009-7-27 P,18
End of this Unit
