MẠNG MÁY TÍNH (COMPUTER NETWORKING) Nội dung mơn học  Chapter 1: Computer Networks and the Internet  Chapter 2: Application Layer  Chapter 3: Transport Layer  Chapter 4: Network Layer  Chapter 5: The Link Layer and Local Area Network  Data Link  Chapter 6: Wireless and Mobile Networks  Chapter 7: Multimedia Networking  Chapter 8: Security in Computer Networks  Chapter 9: Network Management 1.2 Chapter 4: NETWORK LAYER Network Layer Design Isues • Store-and-Forward Packet Switching • Services Provided to the Transport Layer • Implementation of Connectionless Service • Implementation of Connection-Oriented Service • Comparison of Virtual-Circuit and Datagram Subnets 1/9/2017 1.4 1.5 Store-and-Forward Packet Switching The environment of the network layer protocols fig 5-1 1.6  2-key network-layer functions  Forwarding: move pkts from router’s input to appropriate router’s output  Routing: determine route for pkts from source to dest  Routing algorithms 1.7  Interplay btw routing and forwarding 1.8 Services Provided to the Transport Layer  The services need to be carefully designed with the following goals in mind The services should be independent of the router technology The transport layer should be shielded from the number, type, and topology of the routers present The network addresses made available to the transport layer should use a uniform numbering plan, even across LANs and WANs 1.9 Network layer connectionless and connection-oriented service  Datagram network provides network layer connectionless service  Virtual circuits network provides network layer connection- oriented service  Similar to the transport layer services, but:  Service: host-to-host (transport communication: process-toprocess)  No choice: network provides one or the other  Implementation: in network core 1.10 IP addressing: the last word… 1.83 NAT: Network Address Translation 1.84 NAT: Network Address Translation 1.85 NAT: Network Address Translation 1.86 NAT: Network Address Translation 1.87 NAT: Network Address Translation 1.88 NAT traversal problem 1.89 NAT traversal problem 1.90 1.91 The Main IPv6 Header 1/9/2017 The IPv6 fixed header (required) 1.96 96 Extension Headers 5-69 IPv6 extension headers 1/9/2017 97 1.97 Extension Headers (2) The hop-by-hop extension header for large datagrams (jumbograms) 1/9/2017 98 1.98 Extension Headers (3) The extension header for routing 1/9/2017 99 1.99 Summary  Router Architecture  Routing Algorithms  Distance Vector Routing  Link State Routing  Broadcast Routing  Multicast Routing  Congestion and Congestion Control Techniques  Definition  Warning bit, Choke pkt, Load shedding, RED-Random Early Detect, Traffic Paterm  IP address, Subnet mask  CIDR  DHCP  NAT 1.100 Thường kỳ  Network Layer  IPv4 vs IPv6  Data Link Layer  CSMA/CD  Wireless LAN Protocol  Bluetooth  2SV/nhóm // Chọn đề tài  Tên SV + MSSV  Deadline 19/10/2016  Bản in 1.101