Computer networking a top down approach featuring the internet chương 7

... lại Giao thức ap2.0: Alice nói “Tôi Alice” gói IP ch a đ a IP nguồn cô Trudy tạo gói giả mạo đ a IP Alice đ a IP Alice “Tôi Alice” Bảo mật mạng 27 Sự chứng thực: thử lại Giao thức ap3.0: Alice ... biết mẫu mã h a ký tự đơn  Hỏi: Làm Bob Alice th a thuận giá trị kh a? Bảo mật mạng 11 Mã h a kh a đối xứng: DES DES: Data Encryption Standard  chuẩn mã h a Hoa Kỳ [NIST 1993]  kh a đối xứng ... Mã h a kh a đối xứng KA-B KA-B văn gốc, m giải thuật văn mã mã h a K (m) A- B giải thuật văn gốc giải mã m = K ( KA-B(m) ) A- B kh a đối xứng: Bob Alice biết (đối xứng) A- B kh a: K  vd: kh a biết...

Computer Networking: A Top Down Approach Featuring the Internet - Chapter 7 Multimedia Networking docx

... conceal errors: repeat nearby data r 7: Multimedia Networking 7- Chapter outline Ì 7. 1 Multimedia Networking Applications Ì 7. 2 Streaming stored audio and video Ì 7. 3 Real-time Multimedia: Internet ... available bandwidth 7: Multimedia Networking 7- Chapter outline Ì 7. 1 Multimedia Networking Applications Ì 7. 2 Streaming stored audio and video Ì 7. 3 Real-time Multimedia: Internet Phone study Ì 7. 4 ... at a PC-2PC Internet phone example in detail 7: Multimedia Networking 7- Interactive Multimedia: Internet Phone Introduce Internet Phone by way of an example Ì speaker’s audio: alternating talk...

Computer Networking A Top-Down Approach Featuring the Internet phần 7 pps

... the same Ethernet LAN Let the sending adapter, adapter A, have physical address AA-AA-AA-AA-AA-AA and the receiving adapter, adapter B, have physical address BB-BB-BB-BB-BB-BB The sending adapter ... network layer That is to say, when adapter A wants to send a datagram to adapter B, adapter A encapsulates the datagram in an Ethernet frame and sends the frame into the LAN, without first "handshaking" ... the caravan as being a packet, each car in the caravan as being a bit, and the toll booth service rate as the transmission rate of a link Consider now what the cars in the caravan when they arrive...

Computer Networking: A Top Down Approach Featuring the Internet - Chapter 3 Transport Layer ppt

... application transport network data link physical available: r r delay guarantees bandwidth guarantees Transport Layer 3- 6 Chapter outline Ì 3. 1 Transport- layer services Ì 3. 2 Multiplexing and ... than one transport protocol available to apps r Internet: TCP and UDP application transport network data link physical application transport network data link physical Transport Layer 3- 4 Transport ... udt_send(sndpkt) start_timer Transport Layer 3- rdt3.0 in action Transport Layer 3- rdt3.0 in action Transport Layer 3- Performance of rdt3.0 Ì rdt3.0 works, but performance stinks Ì example: Gbps link,...

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Computer Networking: A Top Down Approach Featuring the Internet - Chapter 9 Network Management potx

... whose data is gathered into a Management Information Base (MIB) agent data agent data managed device managed device Network 9-5 Network Management standards OSI CMIP Ì Common Management Information ... Ì de facto network management standard Network 9-6 Chapter outline Ì What is network management? Ì Internet- standard management framework r Structure of Management Information: SMI r Management ... Infrastructure for network management definitions: managing entity agent data managing data entity managed device agent data network management protocol managed device managed devices contain managed objects...

Computer Networking A Top-Down Approach Featuring the Internet phần 1 pptx

... Overheads: Computer Networking: A Top Down Approach Featuring the Internet Chapter 3: The Transport Layer q q chapter 3a. ppt (Part 1, powerpoint format, 1. 201M, last update: 28-Dec-99) chapter3b.ppt ... Daytona Beach and then ask someone else In Daytona Beach another gas station attendant also extracts the Orlando portion of the address and tells Joe that he should take I-4 directly to Orlando ... that you calculate the end-to-end delay analytically and then verify your calculation with the applet 15 : 51: 40 Tracing Routes in the Internet Traceoute is a popular program for tracing a packet's...

Computer Networking A Top-Down Approach Featuring the Internet phần 2 ppsx

... 4 )20 /11 /20 04 15:51:48 ATMover (AAL), the ATM Layer, and the ATM Physical Layer: ATM Adaptation Layer (AAL) ATM Layer ATM Physical Layer Figure 1.10-1: The three ATM layers The ATM Physical Layer deals ... the ATM protocol stack consists of three layers: the ATM adaptation layer file:///D|/Downloads/Livros/computação /Computer% 20 Net %2 0Approach% 2 0Featuring% 2 0the% 2 0Internet/ ATMintro.htm (2 of 4 )20 /11 /20 04 ... document transfers, and financial applications require fully reliable data transfer, i.e., no data loss In particular, a loss of file data, or data in a financial transaction, can have devastating...

Computer Networking A Top-Down Approach Featuring the Internet phần 3 doc

... packages The java.io package contains classes for input and output streams In particular, the java.io package contains the BufferedReader and DataOutputStream classes, classes that the program ... contain the hostname of a mail server associated with the alias name Name The additional section will contain a Type A record providing the IP address for the canonical hostname of the mail server ... receivePacket.getPort(); The above three lines unravel the packet that arrives from the client The first of the three lines extracts the data from the packet and places the data in the String sentence; it has an analogous...

Computer Networking A Top-Down Approach Featuring the Internet phần 4 ppt

... some other task and may not even attempt to read the data until long after it has arrived If the application is relatively slow at reading the data, the sender can very easily overflow the connection's ... [Jain 1996] R Jain S Kalyanaraman, S Fahmy, R Goyal, S Kim, "Tutorial Paper on ABR Source Behavior ," ATM Forum/96-1270, October 1996 [Ramakrishnan 1990] K K Ramakrishnan and Raj Jain, "A Binary ... We'll assume that the two connections have the same MSS and RTT (so that if they have the same congestion window size, then they have the same throughput), that they have a large amount of data to...

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