osi network layer 3

... Website: www.bkacad.com 39 Network Layer Protocols and Internet Protocol (IP) Học viện mạng Bách khoa - Website: www.bkacad.com 3 • Define the basic role of the Network Layer in data networks • The protocols ... between the Data Link layer and the Network layer is the establishment of a maximum size for the packet. Network Layer Fields Học viện mạng Bách khoa - Website: www.bkacad.com 13 • 4 bits • Indicates ... 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...

Ngày tải lên: 22/12/2013, 13:17

... IN Feb 11, 20 13 - Feb 22, 20 13 Live Event SANS Scottsdale 20 13 Scottsdale, AZUS Feb 17, 20 13 - Feb 23, 20 13 Live Event SANS Belgium 20 13 Brussels, BE Feb 18, 20 13 - Feb 23, 20 13 Live Event RSA ... 20 13 - Mar 09, 20 13 Live Event SANS 20 13 Orlando, FLUS Mar 08, 20 13 - Mar 15, 20 13 Live Event SANS Secure Canberra 20 13 Canberra, AU Mar 18, 20 13 - Mar 23, 20 13 Live Event SANS Monterey 20 13 Monterey, ... Monterey, CAUS Mar 22, 20 13 - Mar 27, 20 13 Live Event SANS Abu Dhabi 20 13 Abu Dhabi, AE Mar 23, 20 13 - Mar 28, 20 13 Live Event SANS Anaheim 20 13 OnlineCAUS Jan 09, 20 13 - Jan 14, 20 13 Live Event SANS...

Ngày tải lên: 05/03/2014, 21:20

Ngày tải lên: 21/06/2014, 14:20

... router 2 23. 1.1.1 2 23. 1.1.2 2 23. 1.1 .3 2 23. 1.1.4 2 23. 1.2.9 2 23. 1.2.2 2 23. 1.2.1 2 23. 1 .3. 2 2 23. 1 .3. 1 2 23. 1 .3. 27 network consisting of 3 subnets subnet Network Layer 4-5 Two Key Network- Layer Functions ❒ forwarding: ... outgoing link Network Layer 4-11 Network layer connection and connection-less service ❒ datagram network provides network- layer connectionless service ❒ VC network provides network- layer connection ... to 10.0.0.1, 33 45 Network Layer 4 -33 IP datagram format ver length 32 bits data (variable length, typically a TCP or UDP segment) 16-bit identifier header checksum time to live 32 bit source...

Ngày tải lên: 12/09/2012, 15:06

... ipv6 address 2001:0000:0 234 :C1AB:0000:0000:AABC:003F # 2001:0: 234 :C1AB:0:0:AABC:3F 2001:0:0 234 :C1ab:0:0:aabc:3F 2001::0 234 :C1ab:0:0:aabc:003F 2001:0:0 234 :C1ab::aabc:003F Or even # loopback address 0:0:0:0:0:0:0:1 # ... from 194.12. 230 . 130 to 194.12. 230 .140. 1. Propose a mask of sub -network for the network of company. 194.12. 230 .0 is a Class C address, the last byte must be used to encode the numbers of sub -network ... sub -network. - 194.12. 230 .0/255.255.255.192 Administrative sub network address range: 194.12. 230 .1 (00 000001) has 194.12. 230 .62 (00 111110) - Engineers in 194.12. 230 .64/255.255.255.192 network...

Ngày tải lên: 17/09/2012, 09:13

... và 23 server. ở đây ta chọn No, use Routing and Remote Access to authenticate connection requests Nhấn next để đến cửa sổ kế tiếp. Nhấn Finish để hoàn tất. Chương 3: VPN Layer 3 Với L3 VPNs ... chúng ta sẽ nghiên cứu các thành phần sau: 1. Layer 3 Tunneling Các công nghệ VPN ở lớp 3 được thiết kế để hoạt động ở lớp network của mô hình OSI. Một cách tiêu biểu, các công nghệ VPN này ... chạy trong lớp 2 hoặc lớp 3, các khối xây dựng mô tả dưới đây có thể được L2 chỉ, L3 chỉ, hoặc kết hợp cả hai. Chuyển mạch nhãn đa (MPLS) chức năng làm mờ bản sắc L2-L3. RFC 4026 tổng quát các...

Ngày tải lên: 26/04/2013, 11:43

Ngày tải lên: 14/08/2013, 13:41

... from a network server to the Flash memory. 640-607 www.testking.com -2- CCNA FOUNDATIONS 4 OSI Model 4 Upper Layer 5 Lower Layers 5 Data Link Layer Tasks 6 Network Layer Tasks ... Transport Need Network Data Data Link Processing Physical Appliction (Upper) Layers Application Presentation Session Transport Layer Network Layer Data Link Layer Presentation Layer ... Windowing 29 TCP/IP Internet Layer 29 ICMP 30 IP Addressing Basics 30 640-607 www.testking.com -8- Transport Layer Tasks For two devices to communicate within a network a connection or...

Ngày tải lên: 22/10/2013, 17:15

... VPN Primer 3 Layer 3 MPLS VPN Services Introduction 3 Layer 3 MPLS VPN Terminology 4 Strengths and Limitations of MPLS Layer 3 VPN Services 6 Layer 3 MPLS VPN Operation 6 Layer 3 MPLS VPN ... 409600, localpref 100, weight 32 768, valid, sourced, best Extended Community: RT:100:1 0x8800 :32 768:0 0x8801:10:1 536 00 0x8802:65281:256000 0x88 03: 65281:1500 38 Layer 3 MPLS VPN Enterprise Consumer ... following topics: • Layer 3 MPLS VPN Route Distribution Operation, page 7 • Layer 3 MPLS VPN Forwarding Operations, page 8 Layer 3 MPLS VPN Route Distribution Operation Figure 3 illustrates an...

Ngày tải lên: 26/10/2013, 23:15

... Transport layer, placed into packets by the Network layer, and further encapsulated as frames by the Data Link layer. The purpose of the Physical layer is to create the electrical, optical, ... 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: ... as network adapters (NICs), interfaces and connectors, cable materials, and cable designs are all specified in standards associated with the Physical layer. Characteristics & Uses of Network...

Ngày tải lên: 22/12/2013, 13:17

... data employed by TCP (refer to 4 .3. 3.1) Học viện mạng Bách khoa - Website: www.bkacad.com 33 Controlling the Conversation • Segmentation and Reassembly - Most networks have a limitation on the ... viện mạng Bách khoa - Website: www.bkacad.com 43 TCP Header format: Sequence Học viện mạng Bách khoa - Website: www.bkacad.com 13 • Sequence Number: 32 bits – The sequence number of the first data ... numbers – FIN: No more data from sender Transport Layer Role and Services • Major functions of the transport layer and the role it plays in data networks – Tracking the individual communication...

Ngày tải lên: 22/12/2013, 13:17

... test125.test.local TCP TCP: Flags= A , SrcPort=10 63, DstPort=DCE endpoint resolution( 135 ), Len=0, Seq= 539 1 633 82, Ack=98 133 5462, Win=6 533 9 (scale factor 0) = 6 533 9 61 0.187500 {MSRPC:14, TCP:12, IPv4:5} ... 6 533 9 175 2.0 937 50 {TCP:11, IPv4:8} 172.16.11.124 test125.test.local TCP TCP: Flags= A , SrcPort=1070, DstPort=DCE endpoint resolution( 135 ), Len=0, Seq =30 035 14721, Ack=40887016 53, Win=65 535 ... Alter Cont Resp: Call=0x3 Assoc Grp=0x 333 E Xmit=0x16D0 Recv=0x16D0 43 0.10 937 5 {MSRPC:14, TCP:12, IPv4:5} test124.test.local test125.test.local DCOM DCOM 44 0.10 937 5 {MSRPC:14, TCP:12, IPv4:5}...

Ngày tải lên: 21/01/2014, 03:20

... routing protocol does not work at transport layer, layer 4. Many routing protocols work at layer 3, the network layer. Steve McQuerry. Interconnecting Cisco Network Devices. (Cisco Press: 2000) pages ... Step 2: The transport layer segments the data. Step 3: The network layer puts the data into packets. Step 4: The data link layer puts data into frames. Step 5: The physical layer transmits the ... We need 3 bits for the hosts (2 ^3- 2=6 > 5). This would provide for 30 subnets (2^5-2 =30 ). A 29bit (24 + 5) network mask translates the 4 th octet to 248 (=11111000 binary). The network...

Ngày tải lên: 24/01/2014, 13:20

... test125.test.local TCP TCP: Flags= A , SrcPort=10 63, DstPort=DCE endpoint resolution( 135 ), Len=0, Seq= 539 1 633 82, Ack=98 133 5462, Win=6 533 9 (scale factor 0) = 6 533 9 61 0.187500 {MSRPC:14, TCP:12, IPv4:5} ... 65 535 8 0.015625 {TCP:6, IPv4:5} test125.test.local test124.test.local TCP TCP: Flags=.S A , SrcPort=DCE endpoint resolution( 135 ), DstPort=10 63, Len=0, Seq=98 133 5265, Ack= 539 1 632 86, Win=65 535 ... 65 535 9 0.015625 {TCP:6, IPv4:5} test124.test.local test125.test.local TCP TCP: Flags= A , SrcPort=10 63, DstPort=DCE endpoint resolution( 135 ), Len=0, Seq= 539 1 632 86, Ack=98 133 5266, Win=65 535 ...

Ngày tải lên: 25/01/2014, 14:20

... B) and add dots for separation. 19.48 Figure 19. 13 An ISP and NAT 19 .31 Figure 19.4 A network configuration for the block 205.16 .37 .32 /28 19 .30 c. The number of addresses can be found by complementing ... 19.19 Figure 19 .3 A block of 16 addresses granted to a small organization 19.5 The address space of IPv4 is 2 32 or 4,294,967,296. Note 19.16 Table 19.2 Default masks for classful addressing 19 .3 An IPv4 ... discussed in this section: 19.7 Numbering systems are reviewed in Appendix B. Note 19.1 Chapter 19 Network Layer: Logical Addressing Copyright © The McGraw-Hill Companies, Inc. Permission required for...

Ngày tải lên: 06/03/2014, 12:20

... section: 20.5 Figure 20 .3 Network layer at the source, router, and destination 20.25 Figure 20.9 Maximum transfer unit (MTU) 20.44 Table 20.9 Comparison between IPv4 and IPv6 packet headers 20 .35 Figure 20. 13 shows ... transition strategies 20.6 Figure 20 .3 Network layer at the source, router, and destination (continued) 20.19 Figure 20.8 Protocol field and encapsulated data 20 .37 Figure 20.14 Taxonomy of options ... is 8 × 4, or 32 bytes. The first 20 bytes are the base header, the next 12 bytes are the options. Example 20.2 20.41 Table 20.6 Next header codes for IPv6 20.1 Chapter 20 Network Layer: Internet...

Ngày tải lên: 06/03/2014, 12:20

... 228.42.0.0. 21 .35 Figure 21.18 IGMP operation 21.18 Figure 21.10 Contents of data field for the error messages 21.21 Figure 21. 13 Encapsulation of ICMP query messages 21 .31 21 -3 IGMP 21 -3 IGMP The ... Time 50: The timer for 238 .71.0.0 in host B expires, and a membership report is sent, which is received by the router and every host. d. Time 70: The timer for 230 . 43. 0.0 in host C expires, ... discussed in this section: Topics discussed in this section: 21 .30 Example 21.5 (continued) 21 .39 Example 21.6 (continued) b. Time 30 : The timer for 225.14.0.0 in host A expires, and a membership...

Ngày tải lên: 06/03/2014, 12:20

Ngày tải lên: 06/03/2014, 12:20

Ngày tải lên: 18/06/2014, 21:40