THE TCP IP PROTOCOL SYSTEM

DE F1102.book Page 419 Tuesday, May 20, 2003 2:53 PM420 Chapter 7: TCP/IP Protocol Suite and IP Addressing■ How to explain IP addressing, IP address classes, reserved IP address space, private IP address space, and IP subnetting■ How to[r]

and 2). The requirements documents, published after many years of experience with the TCP/IP protocols, are considered a major revision to the protocol standards. In essence, requirement documents each review many protocols. They point out known weaknesses o[r]

ACK.application A program that performs a function directly for a user. FTP and Telnet clients are examples of network applications.application layer Layer 7 of the OSI reference model. This layer provides services to application processes (such as e-mail, file transfer, and terminal emulation[r]

3 Summary Electronic mail is among the most widely available application services. Like most TCP/IF' services, it uses the client-server paradigm. The mail system buffers out- going and incoming messages, allowing the transfer from client and server to occur[r]

line. Also see SLIP. promiscuous ARP See proxy ARP. promiscuous mode A feature of network interface hardware that allows a computer to receive all pack- ets on the network. protocol A formal description of message formats and the rules two or more machines must follow to exchang[r]

con thì đ c thi t l p xu ng 0. Nh v y khi th c hi n bit mask (th c hi n logic ANDgi a đ a ch IPv4 th c và Subnet mask) s có đ c đ a ch đ i di n cho m ng conc n tìm.Trong th c t t ch c m ng, m t m ng có th đ c chia thành nhi u m ng con(subnet) nh m t ng thêm tính linh ho t cho vi c qu n lý m ng, lúc[r]

15.15 BGP Path Attributes We said that BGP is not a pure distance-vector protocol because it advertises more than a next hop. The additional information is contained in the Path Attributes field of an update message. A sender can use the path attributes to specify: a next[r]

messages and modify the local computer's routing table just like the routed pro- gram. It can also advertise routes from within its autonomous system using BGP. The rules gated follows allow a system administrator to specify exactly which networks gat- ed may and m[r]

ATM, and that no single form appears to be the emerging standard. Telephone com- panies that offer public ATM networks use an &octet format where each address is an ISDN telephone number defined by ITU standard document E.164. By contrast, the ATM Forum? allows each computer attached[r]

Because TCP identij?es a connection by a pair of endpoints, a given TCP port number can be shared by multiple connections on the same machine. From a programmer's point of view, the connection abstraction is significant. It means a programmer can devise a program that pro[r]

Summary Most computer systems permit multiple application programs to execute simultane- ously. Using operating system jargon, we refer to each executing program as a process. The User Datagram Protocol, UDP, distinguishes among multiple processes within a given machine by allow[r]

- each of the protocols provides a way for a host to obtain the address of a default router along with other bootstrap information. However, BOOTP and DHCP have a serious deficiency: the information they return comes from a database that net- work administrators configure manual[r]

2X problem. However, some route op- timization is possible. In particular, if a site expects a visiting mobile to interact heavi- ly with local computers, the site can arrange to propagate a host-specific route for the mobile. To ensure correct routing, the host-specific route m[r]

field; other clients use zero. If the client's IP address is zero in the request, a server returns the client's IP address in the YOUR IP ADDRESS field. 23.6 The Two-step Bootstrap Procedure BOOTP uses a two-step bootstrap procedure. It does no[r]

sources can be listed. RTP is designed to work with IP multicasting, and mixing is especially attractive in a multicast environment. To understand why, imagine a teleconference that includes many participants. Unicasting requires a station to send a copy of each outgoing RTP packet to each pa[r]

Để tạo điều kiện thuận lợi cho việc phát triển phần mềm trên hệ thống phân tán, mô hình mạng TCP/IP đã qui định một số hàm chuẩn hàm nguyên thủy, quá trình truyền tin sử dụng kỹ thuật nà[r]

Tiểu luận môn Mạng máy tính Seminar SMTP, POP3 IMAP
Hệ thống thư điện tử
Quá trình gửi và nhận mail
SMTP Server
POP3 Server
IMAP Server
4 lý do sử dụng IMAP
Kết luận
Một hệ thống thư điện tử gồm hai ứng dụng chạy trên cùng một máy chủ
Ứng dụng thứ nhất là SMTP Server (Simple Mail Transfer Protocol[r]

GIỚI THIỆU............................................................................................................................ 1
1.1 Mục đích................................................................................................................ 1
1.2 Cài đặt Wireshark.............[r]

The Domain Name System (DNS) Chap. 24 top-level domain is edu (the domain name for educational institutions). As the example shows, domain names are written with the local label first and the top domain last. As we will see, writing them in this order makes[r]

table size and contents are independent of the number of individual hosts connected to the networks. We can summarize the underlying principle: To hide information, keep routing tables small, and make routing de- cisions efficient, IP routing software only keeps informati[r]