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Main window thread •Main Server Form •Create a thread to listen and accept incoming connection Child thread •Listen and accept incoming connection •Create a thread to handle connection Grand-child thread •Handle a connection •Create a thread to handle socket InputStream •Handle socket InputStream

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The Internet Transport Protocols UDP – User Datagram Protocol • Connection-less service • Useful in client-server situations: Remote Procedure Call, real-time AV streaming TCP – Transmission Control Protocol • Connection oriented service • Reliable byte stream services over unreliable network • Most widely used in Internet

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Routing with Subnetting
Routing to destination to an outside network is done as usual
Routing table adds more entries for routing within the network (this-network, subnet, 0): to route message to another subnet (this-network, this-subnet, host): to route message to a host within this-subnet

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General Principles of Congestion Control
Open loop solutions Solve the problems by good design Prevent congestions from happening Make decision without regard to state of the network
Closed loop solutions Using feedback loop Closed Loop Solutions – Three Part Feedback Loop
Monitor the system detect when and where congestion o...

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Services Provided to the Transport Layer
Network layer provides services to the transport layer
Goals of network layer services Independent of router technology The transport layer should be shielded from the number, type and topology of routers Network addresses available to the transport layer should be uniformed and even across LA...

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Content
Broadband wireless
Bluetooth
Network bridges, hubs, switches, routers
Virtual LAN Broadband Wireless - WiMAX • Long-range system, up to 50km • Use licensed spectrum • Provide internet access to end user from ISP • Quality of service can be guaranteed

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ALOHA
Developed by Norman Abramson, in 1970s
Used ground-based radio broadcast
Pure ALOHA Use continuous time No need for global time
Slotted ALOHA Need global time synchronisation Pure ALOHA (1)
Users can transmit whenever they have data to send
If there is a collision, colliding frames will be damaged and will be destro...

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Bandwidth
Signals lose power during transmission
Different transmission facilities diminish different Fourier components with different amounts -> distortion of signals
Usually, high frequency components will be diminished
Bandwidth: range of frequencies can be transmitted without being strongly attenuated

32 trang | Chia sẻ: thanhle95 | Ngày: 03/07/2021 | Lượt xem: 621 | Lượt tải: 2

Course outline (2)
The topics to be covered include: Introduction to network architecture, OSI and the TCP/IP reference models. Network technologies, especially LAN technologies (Ethernet, wireless networks and Bluetooth). Issues related to routing and internetworking, Internet addressing and routing. Internet transport protocols (UDP...

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BÀI TẬP 1: (Lưu tập tin với tên: gioithieu.htm) Thiết kế trang web giới thiệu về bản thân (Họ tên, ngày sinh, quê quán, lớp, Điện thoại.) BÀI TẬP 2: (Lưu tập tin với tên: ChuongTrinhDTWeb.htm) Thiết kế dạng danh sách có đánh số thứ tự lồng nhau. Đường kẽ ngang không bóng 30% cửa sổ (Màu nền, màu chữ, cỡ chữ tùy ý). BÀI TẬP 3: (Lưu tập tin với t...

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