... NetworksHc vin mng Bỏch khoa - Website: www.bkacad.com Chapter 1 - Living in a Network Centric World CCNA Exploration 4. 0CCNA Exploration 4.0Học viện mạng Bách khoa -Website: www.bkacad.com ... complexity of the network and the number of devices a message must pass through on its route to its final destination.ã External factors affecting the success of communication include:– The quality ... www.bkacad.com The Network ArchitectureSecurityHọc viện mạng Bách khoa - Website: www.bkacad.com Examples of Todays Popular Communication Toolsã The existence and broad adoption of the Internet...
... lived c. had lived d. had been living 10 . He said he would visit me, but he…me yet.a. has not visited b. had not visited c. is not visiting d. does not visit 11 . Children need a… environment.a. ... setting. 12 . I have heard that musician… the piano.a. played b. play c. to play d. plays. 13 . Claire has a wide circle of friends and…a. neighborhood b. acquaintances c. friendship d. relations 14 . ... faithfully. 15 . Try… so many mistakes.a. not to make b. not make c. to make not d. make not 16 . Mother warned… the electric plug.a. her not to touch b. her touching not c. her not touch d. not touch. 17 ....
... mạng Bách khoa - Website: www.bkacad.com Chapter 2 - Communicating over the Network CCNA Exploration 4. 0CCNA Exploration 4.0 End Devices and their Role on the Network ã The network devices that ... 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 mạng Bách khoa - Website: www.bkacad.com ... need to communicate with a resource on another network, outside of our local organization.ã Examples of this type of communication include:– Sending an e-mail to a friend in another country–...
... viện mng Bỏch khoa - Website: 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: ... 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 viện mạng Bách khoa - Website: www.bkacad.com ... V35 serial cableã DB 60.ã Smart Serial ã Winchester 15 pinsHọc viện mạng Bách khoa - Website: www.bkacad.com Calculating Address: Case 1 Học viện mạng Bách khoa - Website: www.bkacad.com...
... increase from 10 0 Mbps per wire pair to 12 5 Mbps per wire pair, or 500 Mbps for the four pairs. Each wire pair signals in full duplex, doubling the 500 Mbps to 10 00 Mbps.ã 10 00BASE-T uses ... Ethernet Physical Layerã 10 00BASE-T (IEEE 802.3ab) was developed to provide additional bandwidth.ã 10 00BASE-T (CAT 5e) standard is interoperable with 10 BASE-T and 10 0BASE-TX (Fast Ethernet ... Gigabit Ethernet uses two separate encoding steps. 10 00BASE-T EthernetHc vin mng Bỏch khoa - Website: www.bkacad.com 10 00BASE-T Ethernetã 10 00BASE-T Ethernet provides full-duplex transmission...
... building structures. Not interoperable with the 802 .11 b and 802 .11 g 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 ... 802 .11 b but with the bandwidth of 802 .11 a.ã IEEE 802 .11 n - Is currently in draft form. The proposed standard defines frequency of 2.4 Ghz or 5 GHz. The typical expected data rates are 10 0 ... Longer range and better able to penetrate building structures than devices based on 802 .11 a.ã IEEE 802 .11 g - Operates in the 2.4 GHz frequency band, speed up to 54 Mbps. Devices implementing...