osi network layer cisco ccna networking fundamentals chapter 5

... a destination network H c vi n m ng Bách khoa - Website: www.bkacad.com Network Layer Protocols and Internet Protocol (IP) • • Define the basic role of the Network Layer in data networks The protocols ... networks The protocols of the OSI model Network layer specify addressing and processes that enable Transport layer data to be packaged and transported The Network layer encapsulation allows its ... need to know network portion (network address) to indicate the best path to reach the network H c vi n m ng Bách khoa - Website: www.bkacad.com 35 Routing Protocols • Routing is an OSI Layer function...

Ngày tải lên: 22/12/2013, 13:17

Ngày tải lên: 13/08/2014, 13:21

Ngày tải lên: 13/08/2014, 13:21

Ngày tải lên: 13/08/2014, 13:21

Ngày tải lên: 13/08/2014, 13:21

Ngày tải lên: 13/08/2014, 13:21

Ngày tải lên: 13/08/2014, 13:21

... www.bkacad.com Physical Layer Protocols & Services • The OSI Physical layer provides the means to transport across the network media the bits that make up a Data Link layer frame H c vi n m ng ... any context to give them meaning to the upper layers of the networking model This framing method can be provided by the Data Link layer, the Physical layer, or by both Signal patterns can indicate: ... receiver circuitry on the network devices At this stage of the communication process, the user data has been segmented by the Transport layer, placed into packets by the Network layer, and further encapsulated...

Ngày tải lên: 22/12/2013, 13:17

... Website: www.bkacad.com Transport Layer Role and Services • Explain the purpose of the Transport layer • Enables multiple applications • • to communicate over the network at the same time on a single ... ng Bách khoa - Website: www.bkacad.com Transport Layer Role and Services • Major functions of the transport layer and the role it plays in data networks – Tracking the individual communication ... Overview • • • • Explain the role of Transport Layer protocols and services in supporting communications across data networks Analyze the application and operation of TCP mechanisms...

Ngày tải lên: 22/12/2013, 13:17

Ngày tải lên: 12/08/2015, 09:13

Ngày tải lên: 12/08/2015, 09:13

... Overview • • • • • • Describe how networks impact our daily lives Describe the role of data networking in the human network Identify the key components of any data network Identify the opportunities ... Redundant network – Architecture – Hardware without a – Single point of failure H c vi n m ng Bách khoa - Website: www.bkacad.com Networking Career Opportunities • Information Technology and networking ... these disparate networks onto one platform - a platform defined as a converged network H c vi n m ng Bách khoa - Website: www.bkacad.com Converged Networks • • Intelligent Information Networks: The...

Ngày tải lên: 12/12/2013, 14:15

... requirements.) 21certify.com 29 640-607 NUMBER OF BITS SUBNET MASK 255 . 255 . 255 .192 255 . 255 . 255 .224 255 . 255 . 255 .240 255 . 255 . 255 .248 255 . 255 . 255 . 252 NUMBER OF SUBNETS 14 30 62 NUMBER OF HOSTS 62 30 14 Incorrect ... twenty-eight subnets Which subnet mask should you use? A 255 . 255 .0.28 B 255 . 255 . 255 .0 C 255 . 255 . 255 .28 D 255 . 255 . 255 .248 E 255 . 255 . 255 . 252 Answer: D Explanation: We need to expand the class C subnet mask, ... 192.168. 159 .1 255 . 255 . 255 .0 no shutdown exit interface serial ip address 192.168. 75. 1 255 . 255 . 255 .0 clock rate 64000 no shutdown exit router rip network 192.168. 159 .0 network 192.168. 75. 0 ^z copy...

Ngày tải lên: 24/01/2014, 13:20

... URL:http://mike.passwall.com /networking/ netmodels/isoosi7layermodel.html [4] R Feig, “The OSI Reference Model”, Date Unknown, URL:http://www2.rad.com/networks/1994 /osi/ osi.htm [5] H S Ha, OSI Layer , 2000 URL:http://userpages.umbc.edu/~hha1 /network/ protocol.html ... http://whatis.techtarget.com/definition/0,289893,sid9_gci 550 5 25, 00.html [11] R Anderson, “Security Engineering”, Wiley, 2001, p314 [12] Cisco Systems, Cisco SAFE Enterprise Layer Two Addendum”, 2003, URL:http://www .cisco. com/en/US/netsol/ns340/ns394/ns171/ns128 /networking_ s ... element in most modern network system designs Anyone who has worked with data networking or security has likely heard the terms layer three” or layer two” or “application layer. ” This terminology...

Ngày tải lên: 05/03/2014, 21:20

... addresses Solution a There must be no leading zero (0 45) b There can be no more than four numbers c Each number needs to be less than or equal to 255 d A mixture of binary notation and dotted-decimal ... a 00000001 00001011 00001011 11101111 b 11000001 10000011 00011011 11111111 c 14.23.120.8 d 252 .5. 15. 111 Solution a The first bit is This is a class A address b The first bits are 1; the third ... 19.30 Figure 19.4 A network configuration for the block 2 05. 16.37.32/28 19.31 Note The first address in a block is normally not assigned to any device; it is used as the network address that...

Ngày tải lên: 06/03/2014, 12:20

... 20-1 INTERNETWORKING In this section, we discuss internetworking, connecting networks together to make an internetwork or an internet Topics discussed in this section: Need for Network Layer Internet ... Internet as a Datagram Network Internet as a Connectionless Network 20.2 Figure 20.1 Links between two hosts 20.3 Figure 20.2 Network layer in an internetwork 20.4 Figure 20.3 Network layer at the source, ... the source, router, and destination 20 .5 Figure 20.3 Network layer at the source, router, and destination (continued) 20.6 Note Switching at the network layer in the Internet uses the datagram...

Ngày tải lên: 06/03/2014, 12:20

... with a multicast address from 224.0.0.0 to 239. 255 . 255 . 255 is masked and delivered to the Ethernet interface 21 .50 Example 21.9 (continued) 21 .51 ... 130.23.43. 25 and physical address A4:6E:F4 :59 :83:AB The two hosts are on the same Ethernet network Show the ARP request and reply packets encapsulated in Ethernet frames Solution Figure 21 .5 shows ... of bytes as 64 This is the total number of bytes in the ICMP packet (56 + 8) 21.24 Example 21.3 (continued) 21. 25 Figure 21. 15 The traceroute program operation 21.26 Example 21.4 We use the traceroute...

Ngày tải lên: 06/03/2014, 12:20

... 22-1 DELIVERY The network layer supervises the handling of the packets by the underlying physical networks We define this handling as the delivery of a packet ... 22.2 Route method versus next-hop method 22 .5 Figure 22.3 Host-specific versus network- specific method 22.6 Figure 22.4 Default method 22.7 Figure 22 .5 Simplified forwarding module in classless ... 180.70. 65. 140 Solution The router performs the following steps: The first mask (/26) is applied to the destination address The result is 180.70. 65. 128, which does not match the corresponding network...

Ngày tải lên: 06/03/2014, 12:20

... barriers and improved student opportunity ITE Chapter © 2006 Cisco Systems, Inc All rights reserved Cisco Public Networks Supporting the way we learn The Cisco Networking Academy Program, is an example ... protocols, that tie these network elements together ITE Chapter © 2006 Cisco Systems, Inc All rights reserved Cisco Public 18 Elements of a network Icons are commonly used to represent networking devices ... reserved Cisco Public 20 Elements of a network http://en.wikipedia.org/wiki/Category _5_ cable ITE Chapter © 2006 Cisco Systems, Inc All rights reserved Cisco Public 21 Elements of a network Human...

Ngày tải lên: 05/07/2014, 00:20