... khoa - Website: www.bkacad.com Chapter 2 - Communicating over the Network CCNA Exploration4. 0CCNA Exploration4. 0 End Devices and their Role on the Network ã The network devices that people ... Security Devices (firewalls). The TCP/IP Modelã The first layered protocol model for internetwork communications was created in the early 19 70s and is referred to as the Internet model.Học viện ... research, the ISO created a network model that helps vendors create networks that are compatible with other networks. ã The Open System Interconnection (OSI) reference model released in 19 84 was the...
... Functionalityand Protocols CCNA Exploration4. 0CCNA Exploration4. 0 DNS - ExampleHọc viện mạng Bách khoa - Website: www.bkacad.com FTPã The File Transfer Protocol (FTP) is another commonly used Application ... running the FTP daemon (FTPd).ã The client establishes the first connection to the server on TCP port 21. The client establishes the second connection to the server over TCP port 20. ã The file ... request message to a server, the HTTP protocol defines the message types the client uses to request the web page and also the message types the server uses to respond. The three common message...
... NetworksHc vin mng Bỏch khoa - Website: www.bkacad.com Chapter1 - Living in a Network Centric World CCNA Exploration4. 0CCNA Exploration4. 0 Học viện mạng Bách khoa -Website: www.bkacad.com ... affecting the success of communication include:– The quality of the pathway between the sender and the recipient– The number of times the message has to change form – The number of times the message ... readressed– The number of other messages being transmitted simultaneously on the Học viện mạng Bách khoa - Website: www.bkacad.com– The number of other messages being transmitted simultaneously on the...
... www.bkacad.comSpeed and Types of Ports/Interfacesã The speed : 10 / 10 0 / 10 00 Mbps. Can increased speeds without replacing the devices. ã The number and type of ports: Just enough ports for ... mixture of UTP speeds? Both UTP and fiber ports?ã The number of UTP ports and fiber ports will be needed. The number of 1 Gbps ports and 10 / 10 0 Mbps ports. Types of Connections in a LANHọc ... Contains the intermediary devices - hubs, switches, routers, and data service units (DSUs) - that tie the network together. These devices provide the transitions between the backbone cabling and the...
... more complex. Gigabit Ethernet uses two separate encoding steps. 10 0 0BASE-T EthernetHc vin mng Bỏch khoa - Website: www.bkacad.com 10 0 0BASE-T Ethernetã 10 0 0BASE-T Ethernet provides full-duplex ... code groups during the interframe spacing. ã The principal differences among the 10 0 0BASE-SX and 10 0 0BASE-LX fiber versions are the link media, connectors, and wavelength of the optical signal. ... to 10 00 Mbps.ã 10 0 0BASE-T uses 4D-PAM5 line encoding to obtain 1 Gbps data throughput. Layer 2 addressing and its Impact on Network Operation and Performanceã The Frame Encapsulating the...
... standards.ã IEEE 802 .11 b - Operates in the 2 .4 GHz frequency band, speed up to 11 Mbps. Longer range and better able to penetrate building structures than devices based on 802 .11 a.ã IEEE 802 .11 g - Operates ... implementing this standard therefore operate at the same radio frequency and range as 802 .11 b but with the bandwidth of 802 .11 a.ã IEEE 802 .11 n - Is currently in draft form. The proposed standard ... IEEE 802 .11 a - Operates in the 5 GHz frequency band, speed up to 54 Mbps, small coverage area; less effective at penetrating building structures. Not interoperable with the 802 .11 b and 802 .11 g...
... using the same shared media. ã Data from only one node can be placed on the medium at any one time. ã Every node sees all the frames that are on the medium, but only the node to which the frame ... network when 24 ã The Data Link layer "sees" the logical topology of a network when controlling data access to the media. It is the logical topology that influences the type of network ... Through an Internetwork 49 Học viện mạng Bách khoa - Website: www.bkacad.com Framing- Role of the Trailer 34 ã Data Link layer protocols add a trailer to the end of each frame. ã The trailer is used...
... specifications FIRST 4. 0 WOW! 14 out of 30 people answered:“I would look for personal satisfaction in the work I have produced” 10 out of 30 people answered:“To be more involved in perfecting the processes ... directly impacts the quality of the printed piece, the efficiency of the press run, and the overall time-to-market for the new product. FIRST 4. 0 Optimizationã The goal of the optimization ... Development Team FIRST 4. 0 Internal Communication FIRST 4. 0 From Beginning to End FIRST 4. 0 Communicationã Optimization: The first step requires the printer to analyze the printing process...