chapter 2 2 4 internet routing architecture

Ngày tải lên: 26/01/2014, 07:20

... 1 544 , Fixed 1 544 , Symmetric Digital Subscriber 20 48 kbps 20 48 kbps Line) SDSL (Symmetric 1.5 or 2. 048 1.5 or 2. 048 Symmetric Digital Subscriber Mbps Mbps Line) VDSL (Very high- 1.6 to 19 .2 12. 96 ... basis Figure 2- 6 illustrates a less-than-optimal connectivity model, and 2- 7 illustrates a redundant interconnection model page 44 Internet Routing Architectures, Second Edition Figure 2- 6 Less-Than-Optimal ... Relay and ATM Internet access services are usually much lower than dedicated access Figure 2- 2 illustrates a typical Frame Relay Internet access model page 37 Internet Routing Architectures,...

Ngày tải lên: 22/12/2013, 20:17

... 23 2 23 2 24 2 24 6 25 2 25 2 25 4 10 Designing Stable Internets Route Instabilities on the Internet BGP Stability Features Looking Ahead Frequently Asked Questions 25 5 25 5 ... of Routing Updates Overlapping Protocols: Backdoors BGP Attributes BGP -4 Aggregation Looking Ahead 26 6 26 7 27 1 28 0 28 2 28 9 29 0 3 02 319 12 Configuring Effective Internet ... 22 Transitioning the Regional Networks from the NSFNET 24 NSF Solicits NIS Managers 25 Other Internet Registries 28 Internet Routing Registries 29 The Once and Future Internet...

Ngày tải lên: 22/12/2013, 20:17

... 23 2 23 2 24 2 24 6 25 2 25 2 25 4 10 Designing Stable Internets Route Instabilities on the Internet BGP Stability Features Looking Ahead Frequently Asked Questions 25 5 25 5 ... 1 544 , Fixed 1 544 , Symmetric Digital Subscriber 20 48 kbps 20 48 kbps Line) SDSL (Symmetric 1.5 or 2. 048 1.5 or 2. 048 Symmetric Digital Subscriber Mbps Mbps Line) VDSL (Very high- 1.6 to 19 .2 12. 96 ... of Routing Updates Overlapping Protocols: Backdoors BGP Attributes BGP -4 Aggregation Looking Ahead 26 6 26 7 27 1 28 0 28 2 28 9 29 0 3 02 319 12 Configuring Effective Internet...

Ngày tải lên: 17/01/2014, 09:20

... address 1 72. 16 .2. 1 25 5 .25 5 .25 5.0 R1(config-if)#clock rate 640 00 R1(config-if)#no shutdown Học viện mạng Bach Khoa - Website: www.bkacad.com 10 Verifying Changes to the Routing Table • The routing ... Khoa - Website: www.bkacad.com 24 CDP Commands Học viện mạng Bach Khoa - Website: www.bkacad.com 25 STATIC ROUTING Học viện mạng Bach Khoa - Website: www.bkacad.com 26 Purpose and Command Syntax ... Khoa - Website: www.bkacad.com 21 CDP Commands Học viện mạng Bach Khoa - Website: www.bkacad.com 22 CDP Commands Học viện mạng Bach Khoa - Website: www.bkacad.com 23 CDP Commands Học viện mạng...

Ngày tải lên: 06/07/2014, 06:44

... 类地址:多播地址,范围是 22 4 到 23 9 5.E 类地址:保留,实验用,范围是 24 0 到 25 5 Network Address:Special Purpose 一些特殊的 IP 地址: 1.IP 地址 127 .0.0.1:本地回环(loopback)测试地址 2. 广播地址 :25 5 .25 5 .25 5 .25 5 3.IP 地址 0.0.0.0:代表任何网络 4. 网络号全为 0:代表本网络或本网段 ... 类地址中:10.0.0.0 到 10 .25 5 .25 5 .25 5 .25 5 2. B 类地址中:1 72. 16.0.0 到 1 72. 31 .25 5 .25 5 3.C 类地址中:1 92. 168.0.0 到 1 92. 168 .25 5 .25 5 Broadcast Address 广播地址: 1.层 广播:FF.FF.FF.FF.FF.FF,发送给 LAN 内所有节点 2. 层 广播:发送给网络上所有节点 ... 向网上所有的主机发送报文,也就是说,不管物理网络特性如何 ,Internet 网支持广播传输.如 136.78 .25 5 .25 5 就是 B 类地址中的一个广播地址,你将信息送到此地址,就是将信息送给网络 号为 136.78 的所有主机.有时需要在本网内广播,但又不知道本网的网络号时,TCP/IP 协议规 定 32 比特全为 的 IP 地址用于本网广播,即 25 5 .25 5 .25 5 .25 5 Private IP Address...

Ngày tải lên: 09/12/2013, 17:15

... Website: www.bkacad.com The Internet – A Network of Networks • • • A global mesh of interconnected networks (internetworks) meets these human communication needs The Internet is created by the ... individual networks to form an internetwork Examples of intermediary network devices are: – Network Access Devices (Hubs, switches, and wireless access points) – Internetworking Devices (routers) ... The TCP/IP Model • The first layered protocol model for internetwork communications was created in the early 1970s and is referred to as the Internet model H c vi n m ng Bách khoa - Website: www.bkacad.com...

Ngày tải lên: 12/12/2013, 14:15

... follows: Tð3:6Þ ¼ ð 20 :356 25 À 20 :1 12 50Þ =20 :1 12 50Þ Â ð 12= 6Þ ¼ 2: 42 4 % Our treasurer was thus able to hedge his interest rate risk but has borrowed ¼ 20 m C from his bank, ¼ 20 m that he will not be ... 20 :356 25 m C But his 3-month investment turns ¼ 20 m into: C 20 Â ð1 þ 1 =4% Â 3= 12 ¼ 20 :1 12 50 The implied rate obtained is called the forward–forward rate and is expressed as follows: Tð3:6Þ ¼ ð 20 :356 ... the difference between the market rate and 2. 42 4 % on a predetermined principal In months’ time, if the 6-month (floating benchmark) rate is below 2. 42 4 % (the guaranteed rate), the company will...

Ngày tải lên: 24/12/2013, 02:17

... reliability mechanism (TCP) ƒ Hides detail of underlying network „ Internet Layer (IP) ƒ Routing of data TCP/IP Protocol Architecture (2) „ Network Layer ƒ Logical interface between end system and ... commercial protocol architecture „ Specified and extensively used before OSI „ Developed by research funded US Department of Defense „ Used by the Internet TCP/IP Protocol Architecture( 1) „ Application ... Some Protocols in TCP/IP Suite Required Reading „ Stallings chapter „ Comer,D Internetworking with TCP/IP volume I „ Comer,D and Stevens,D Internetworking with TCP/IP volume II and volume III, Prentice...

Ngày tải lên: 16/02/2014, 08:20

... 1 72. 16.3.0 / 24 and 1 72. 16 .2. 0 / 24 networks Ÿ R2 can communicate with any device on the 1 72. 16.1.0 / 24 , 1 72. 16 .2. 0 / 24 , and 1 92. 168.1.0 / 24 networks Ÿ R3 can communicate with any device on the 1 92. 168.1.0 / 24 ... (more soon) 45 Pings from R2 to 1 72. 16.3.1 R2# ping 1 72. 16.3.1 R2# show ip route 1 72. 16.0.0 / 24 is subnetted, subnets C 1 72. 16.1.0 is directly connected, FastEthernet0/0 C 1 72. 16 .2. 0 is directly ... are dropped 47 Pings from R2 to 1 92. 168.1.1 R2# ping 1 92. 168.1.1 !!!! R2# show ip route 1 72. 16.0.0 / 24 is subnetted, subnets C 1 72. 16.1.0 is directly connected, FastEthernet0/0 C 1 72. 16 .2. 0 is directly...

Ngày tải lên: 09/03/2014, 13:20

... with any device on the 1 72 16 0 / 24 R1 1 72. 16.3.0 / 24 and 1 72. 16 .2. 0 / 24 networks –R2 can communicate with any device on the 1 72. 16.1.0 / 24 , 1 72. 16 .2. 0 / 24 , and 1 92. 168.1.0 / 24 networks –R3 can communicate ... 1 92. 168 .2. 0 25 5 .25 5 .25 5.0 1 72. 16 .2. 2 A new static route must be rewritten in the configuration R1(config)# no ip route 1 92. 168 .2. 0 25 5 .25 5 .25 5.0 1 72. 16 .2. 2 R1(config)#ip route 1 92. 168 .2. 0 25 5 .25 5 .25 5.0 ... -R1(config)#ip route 1 92. 168.1.0 25 5 .25 5 .25 5.0 1 72. 16 .2. 2 -R1(config)#ip route 1 92. 168 .2. 0 25 5 .25 5 .25 5.0 1 72. 16 .2. 2 ITE PC v4.0 Chapter © 20 07 Cisco Systems, Inc All rights reserved Cisco Public 40 Static...

Ngày tải lên: 05/07/2014, 03:20

Ngày tải lên: 07/07/2014, 09:20

... D E 10 110 1110 1111 Highest 0.0.0.0 128 .0.0.0 1 92. 0.0.0 22 4. 0.0.0 24 0.0.0.0 127 .25 5 .25 5 .25 5 191 .25 5 .25 5 .25 5 22 3 .25 5 .25 5 .25 5 23 9 .25 5 .25 5 .25 5 25 5 .25 5 .25 5 .25 5 on a local link Although the multicast ... of address space 1 /25 6 1 /25 6 1/ 128 1/ 128 1/ 128 1/ 128 1/ 128 1/ 128 1/ 128 1/16 1/8 1/8 1/8 1/8 1/8 1/8 1/16 1/ 32 1/ 64 1/ 128 1/5 12 1/1 0 24 1/1 0 24 1 /25 6 Rest of address (variable) 128 bits occupy up ... extend from 22 4. 0.0.0 to 23 9 .25 5 .25 5 .25 5, address 22 4. 0.0.0 is never used and 22 4. 0.0.1 is assigned to the permanent group of all IP hosts, including gateways A packet addressed to 22 4. 0.0.1 will...

Ngày tải lên: 09/08/2014, 06:23

... 20 5,568 21 4 ,26 9 22 3,156 23 2 ,23 5 24 1, 525 25 1,050 26 0, 846 27 0,9 32 281, 347 29 2,111 20 5,568 21 4 ,26 9 22 3,156 23 2 ,23 5 24 1, 525 25 1,050 26 0, 846 27 0,9 32 281, 347 29 2,111 303 , 24 5 303 , 24 5 The tables above are ... 49 5 ,22 4 42 8 , 145 43 5,7 74 443 ,3 82 45 0, 948 45 8 ,47 1 46 5, 941 47 3,370 48 0,738 48 8,033 49 5 ,22 4 5 02, 287 5 02, 287 Population-estimates urban (1000) Africa developing AGG_COUNTRIES 20 5,568 21 4 ,26 9 22 3,156 23 2 ,23 5 ... 19 94 1995 1996 1997 1998 1999 20 00 20 01 20 02 2003 Population-estimates rural (1000) Africa developing AGG_COUNTRIES 42 8 , 145 43 5,7 74 443 ,3 82 45 0, 948 45 8 ,47 1 46 5, 941 47 3,370 48 0,738 48 8,033 49 5 ,22 4...

Ngày tải lên: 11/08/2014, 21:21

... satisfactory (Fig 2. 22) It may suffer a large amount of Structural requirements separate issue and is considered separately in the design of structures 2. 5 Conclusion Fig 2. 22 A structure with ... significant 2. 4 Strength and rigidity 2. 4. 1 Introduction The application of load to a structure generates internal forces in the elements and external reacting forces at the foundations (Fig 2. 16) ... structure in a symmetrical configuration Fig 2. 10 In practice, bracing elements are frequently confined to a part of each panel only Figures 2. 11 and 2. 12 show typical bracing systems for multi-storey...

Ngày tải lên: 14/08/2014, 10:22

... Me.TONDAUKY.Locked = True Me.TGTONDAUKY.Locked = True Exit Sub Err_huy_Click: MsgBox "Huy thao tac", 64, "Thong bao" Me.huy.Visible = False Me.luu.Visible = False Me.moi.Visible = True Me.xoa.Visible ... Err.Description End Sub Trang Vẽ ComboBox Form Header, vào Properties ComboBox, đổi Column Count = 2, chọn thuộc tính Row Source, nhấn vào nút có bên phải Query, Add vào Table DMNCC, chọn cột hiển ... "KH01" Exit Function Else KH.Index = "STT" KH.MoveFirst MKH = "KH" & Format(Val(Right(KH!MAKH, 2) ) + 1, "00") End If Trang End Function - mã lệnh nút Option Compare Database Private Sub dau_Click()...

Ngày tải lên: 04/09/2012, 10:16

... creating an opening for criticism (Coombs, 1998; 20 07; Massey, 20 01, p 158; Coombs and ¨ ¨ Holladay, 20 02; Boin et al., 20 08; Brandstrom et al., 20 08) From a political perspective, a crisis does ... emergency’ (22 August 20 08), whereas South Australian Premier Mike Rann said that even if Queensland irrigators had acted legally, it ‘doesn’t mean to say it’s right’ (22 August 20 08) In contrast ... emissions scheme in 20 12 As a result, Brendan Nelson lost his position to Malcolm Turnbull2 (Sydney Morning Herald, 16 September 20 08) On the other hand, ever since it came to power in 20 07, the government...

Ngày tải lên: 07/10/2012, 15:57

... phần G+C ADN 25 μl ADN (2- 25μg), giữ 60 oC Giữ 100oC phút Làm lạnh chậu đá, spin down Mẫu ADN 25 μl + đệm acetate (40 mM, pH 5,3) chứa 2mM ZnSO4 25 μl + dung dịch nuclease P1 (20 U/ml) 25 μl Spin down ... bị cho mẫu chuẩn 10 -20 μl (25 nmol) mẫu, làm khô hút chân không (khoảng 2h) - Thêm 20 μl Ethanol/DW/Triethylamine 2/ 2/1, trộn đều, làm khô hút chân không (khoảng 2h) - Thêm 20 μl Ethanol/DW/Triethylamine/Phenylisothiocyanate ... phần: Acid humic 1g CaCO3 0, 02 g FeSO4.7H2O 0,01 g KCl 1,71 g MgSO4.7H2O 0,05 g Na2HPO4 0,5 g Hỗn hợp vitamin nhóm B* ml Cycloheximide 500 mg Thạch 18 g Nước cất 1L pH 7 ,2 *Hỗn hợp vitamin nhóm B...

Ngày tải lên: 09/10/2012, 08:37

... fh = 21 / n − f1 n Tích số độ lợi – băng thông (GainBandwith Product, GBW): Mạch kđ liên tầng (3) Sự suy giảm tần số cắt cao theo số tầng khuếch đại: n fh/f1 1.0 0. 64 0.51 0 .44 0.39 f1 = 2 Rb ... β = fT ≈ 2 Cb 'e  fT dùng để ước lượng giới hạn tần số cao BJT cho nhà sản xuất Giá trị thực tế bị giảm điện dung Miller: GBWBJT   gm = g m Rb 'e  =  2 Rb 'e ( Cb 'e + C M )  2 ( Cb 'e ... độ khóa: thời gian trễ (delay time) Mạch sử dụng để tính thời gian trễ vB 'E ≈ V2 − (V1 + V2 ) e − t /τ d  V1 + V2  with vB 'E = 0.7 V and τ d = ri Cibo then t d ≈ τ d  ln  V − 0.7   13 ...

Ngày tải lên: 16/10/2012, 08:47