Thư viện tài liệu, ebook tổng hợp lớn nhất Việt Nam

Speed and throughput: 10 to 1000 Mb/s Average cost per node: Least expensive Media and connector size: Small Maximum cable length: Varies

18 trang | Chia sẻ: nguyenlam99 | Ngày: 09/01/2019 | Lượt xem: 890 | Lượt tải: 0

Bước 1: Cho phép ISIS bằng lệnh router isis Bước 2: Cấu hình NET, gán area bằng lệnh net networkaddress Bước 3: Cho phép ISIS trên tất cả các interfaces bằng lệnh ip router isis. Kiểm tra bằng các lệnh: • show clns neighbor • show clns interface E0 • show isis database • show isis database detail LSPID

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The routing algorithm of OSPF maintains a complex database of topology information, which routers use to maintain full knowledge of distant routers. OSPF is a classless, link-state routing protocol that is widely deployed in many networks. OSPF load-balances across four equal metric paths by default on Cisco routers. OSPF supports plaintext an...

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High port density Large frame buffers Mixture of port speeds Fast internal switching Switching modes: Cut-through Store-and-forward Fragment-free

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A redundant switched topology includes multihomed switches and EtherChannel. A redundant switched topology causes looping issues such as broadcast storms. The 802.1D STP establishes a loop-free network. The original STP has been enhanced by PVST+ and RSTP.

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Layer 1 provides the physical media and its encoding. Layer 2 devices provide an interface with the physical media. Layer 2 addresses are MAC addresses. The network layer provides connectivity and path selection between two host systems. Layer 3 addresses are IP addresses.

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Transport layer of the TCP/IP stack Access to the network layer for applications Connection-oriented protocol Full-duplex mode operation Error checking Sequencing of data packets Acknowledgement of receipt Data-recovery features

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VPNs (cont’d.) • PPTP (Point-to-Point Tunneling Protocol) – Microsoft • Encryption, authentication, access services – Dial directly into RRAS access server – Dial into ISP’s remote access server first • L2TP (Layer 2 Tunneling Protocol) – Cisco • Connects VPN using equipment mix • Connect two routers • Tunnel endpoints not on same packet-...

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Gateway – Combinations of networking hardware and software • Connecting two dissimilar networks – Connect two systems using different formatting, communications protocols, architecture – Repackages information – Reside on servers, microcomputers, connectivity devices, mainframes • Popular gateways – E-mail gateway, Internet gateway, LAN ga...

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Best Practices for Cable Installation and Management • Choosing correct cabling – Follow manufacturers’ installation guidelines – Follow TIA/EIA standards • Network problems – Often traced to poor cable installation techniques • Installation tips to prevent Physical layer failures

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