Network Data Access Protocol

Công nghệ OpeNDAP (Open-source Project for a Network Data Access Protocol) được sử dụng để truy cập lấy số liệu toàn cầu cho khu vực Ấn Độ Dương phục vụ nghiên cứu. Dòng hải lưu Ấn Độ Dương đã được tính toán trong thời gian dài hàng năm, các kết quả tính toán cho thấy: Tồn tại các dòng hải lưu mạnh chảy liên tục từ Tây sang Đông cách xa đất liền nằm trong khoảng vĩ độ từ 50 S đến 50N và dòng hải lưu sát bờ phía Tây với tốc độ trên 100 cm/s.

8p miulovesmile 09-10-2018 48 1   Download

Bài báo trình bày các kết quả nghiên cứu bước đầu về dòng hải lưu tây bắc Thái Bình Dương bằng mô hình số (ROMS). Sử dụng công nghệ OpeNDAP (Open-source Project for a Network Data Access Protocol) truy cập lấy số liệu toàn cầu ở khu vực nghiên cứu làm đầu vào cho mô hình.

11p quaymax3 05-09-2018 48 1   Download

Chapter 5 - LAN architecture. After studying this chapter you will be able to: Identify the seven protocol layers of the Open System Interconnection (OSI) Reference Model, discuss the functional attributes of each layer of the Open Systems Interconnection Reference Model, understanding Putting Data on the Cable and Access Methods.

38p nhanmotchut_3 20-10-2016 32 2   Download

The Hypertext Transfer Protocol (HTTP) is a protocol used mainly to access data on the World Wide Web. HTTP functions like a combination of FTP and SMTP. This chapter provides knowledge of Hypertext Transfer Protocol (HTTP): HTTP transaction, request message, response message, header, examples, some other features.

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This chapter identify the basic characteristics of network media used in Ethernet, describe the physical and data link features of Ethernet, describe the function and characteristics of the media access control method used by Ethernet protocol,... For more information, inviting you refer lecture.

135p youcanletgo_01 04-01-2016 65 6   Download

Upon completion of this chapter, you will be able to: Explain the role of Data Link layer protocols in data transmission, describe how the Data Link layer prepares data for transmission on network media, describe the different types of media access control methods,... Inviting you to refer.

96p youcanletgo_01 04-01-2016 64 5   Download

In chapter 4, students will be able to: Explain how physical layer protocols and services support communications across data networks, build a simple network using the appropriate, explain the role of the data link layer in supporting communications across data networks, compare media access control techniques and logical topologies used in networks.

66p youcanletgo_01 29-12-2015 69 4   Download

Carrier Sense Multiple Access (CSMA) is a probabilisticMedia Access Control (MAC) protocol in which a node verifies the absence of other traffic before transmitting on a shared transmission medium CAN uses a nondestructive bitwise arbitration, which means that messages remain intact after arbitration is completed even if collisions are detected. All the arbitration takes place without corruption or delay of the message that wins the arbitration.

36p xblue06 13-05-2013 84 11   Download

Radio based communication, open air The attacker, having a radio transmitter and receiver with the same radio frequency of the underlying wireless network, can easily: Intercept wireless data Connect his computing devices to a nearby wireless network Inject new packets to an existing wireless network Jam a particular wireless channel using a jamming device Security measures Implement encryption algorithms, authentication algorithms, and integrity-check algorithms at the data-link layer Provide network access with wired equivalent privacy Higher-layer protocols and applications can be used ...

32p muathu_102 28-01-2013 54 5   Download

In random access or contention methods, no station is superior to another station and none is assigned the control over another. No station permits, or does not permit, another station to send. At each instance, a station that has data to send uses a procedure defined by the protocol to make a decision on whether or not to send.

54p trada85 22-01-2013 63 6   Download

Topologies and Access Methods Describe the basic and hybrid LAN physical topologies, and their uses, advantages and disadvantages Describe the backbone structures that form the foundation for most LANs Compare the different types of switching used in data transmission Understand the transmission methods underlying Ethernet, Token Ring, FDDI, and ATM networks Describe the characteristics of different wireless network technologies, including Bluetooth and the three IEEE 802.11 standards

51p itvovantien 13-07-2012 73 12   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: A Low-Complexity Source Encoding Assisted Multiple Access Protocol for Voice/Data Integrated Networks Andres Kwasinski

14p dauphong20 11-03-2012 49 2   Download

Data Link Layer. Learning Objectives Upon completion of this chapter, you will be able to: Explain the role of Data Link layer protocols in data transmission. Describe how the Data Link layer prepares data for transmission on network media. Describe the different types of media access control methods. Identify several common logical network topologies and describe how the logical topology determines the media access control method for that network. Explain the purpose of encapsulating packets into frames to facilitate media access. ...

48p thanhtung_hk 03-11-2010 185 36   Download

Wireless protocols A MAC protocol for a wireless LAN provides two types of data-transfer Service Access Points (SAP): network and native. The network SAP offers an access to a legacy network protocol (e.g., IP). The native SAP provides an extended service interface that may be used by custom network protocols or user applications capable of fully exploiting the protocol specific Quality of Service (QoS) parameters within the cell service area. Broadband Radio Access Integrated Network (BRAIN) is used for millimeter wave band multimedia communications....

17p huggoo 20-08-2010 88 4   Download

Chapter 5: LAN ARCHITECTURE ATHENA Objectives Identify the seven protocol layers of the Open System Interconnection (OSI) Reference Model Discuss the functional attributes of each layer of the Open Systems Interconnection Reference Model Understanding Putting Data on the Cable and Access Methods ATHENA Content Introduction Open Systems Interconnection (OSI) Reference Model How network sends data Access Method Summary ATHENA Introduction Sending Data • Recognize data • Divide data into manageable chunks • Add information to each chunk – Location of data – Identify receiver • Add ti...

38p hangkute_101091 19-07-2010 94 10   Download

Chương 5. Tầng liên kết dữ liệu 1-6/2006 Chương 5. Giao thức tầng liên kiết dữ liệu (data link) Đặng Xuân Hà Computer Networking 2006 (http://www.hau1.edu.vn/it/dxha/courses/0506/comnet_k48th) Dept. of CS, HAU1. Ch5. Giao thức tầng liên kết dữ liệu 5.1 - Introduction and services 5.2 - Error detection and correction 5.3 - Multiple access protocols & LAN 5.4 - Link-layer addressing & ARP 5.5 - Specific link layer technologies Ethernet PPP Wireless Networks ATM Frame Relay 1-6/2006 Chương 5.

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Identify the basic characteristics of network media used in Ethernet. Describe the physical and data link features of Ethernet. Describe the function and characteristics of the media access control method used by Ethernet protocol. Explain the importance of Layer 2 addressing used for data transmission and determine how the different types of addressing impacts network operation and performance. Compare and contrast the application and benefits of using Ethernet switches in a LAN as apposed to using hubs....

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The media access control methods described by the Data Link layer protocols define the processes by which network devices can access the network media and transmit frames in diverse network environments.

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TCP/IP Quick Guide TCP Services UDP Services IRC Internet Relay Chat DCAP Data Link Switching Client Access Protocol DHCP Dynamic Host Configuration Protocol BOOTP Bootstrap Protocol NTP Network Time Protocol TFTP Trivial File Transfer Protocol ICP Internet Cache Protocol OSI MODEL Layer 7: Application Layer  HTTP HyperText Transfer Protocol Gopher TELNET Virtual Terminal POP3 Post Office Protocol Finger FTP File Transfer Protocol SMTP Simple Mail Transfer Protocol IMAP Internet Message Access Protocol NNTP Network News Transfer Protocol Defines interface to user pr...

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OpenSSH is an open-source implementation of the SSH (Secure SHell) protocols, originally developed in 1995 by Tatu Ylönen. SSH-based tools provide secure client/server connections and are usually designed to replace older remote-access tools like rsh and telnet. Unlike their predecessors, SSH-based tools encrypt their transmissions, making it difficult or impossible for intruders to “sniff” important information, such as passwords, from the data stream. SSH implementations exist for every major platform including Microsoft Windows. This paper will focus on the OpenSSH implementation....

7p huyhoang 06-08-2009 142 32   Download