The Illustrated Network- P71 pptx

... operated by the customer and are at the “edge” of the VPN. At least one link runs to the ISP and carries customer data to and from the ISP’s network. The data on the link can be in plain text (the ... with a VPLS virtual port that forms the endpoint of the MPLS tunnel (LSP) that carries the frames from one LAN to the other.There are many other variations on the basic VPN types described here. ... that we’ve added the P routers to the IBGP mesh. Technically, the P routers do not need to be part of the BGP mesh for the VPN, although the P routers might need to run BGP for other purposes...

The Illustrated Network- P33 pptx

... congested (they are the ﬁ rst to know), so they can easily ﬂ ip some bits in the IPv4 and IPv6 headers of the packets they route. These bits are in the TOS (IPv4) and Flow (IPv6) ﬁ elds, and the hosts ... 11.3, the client chooses an initial sequence number (ISN) in the ﬁ rst SYN sent to the server. The server ACKs the ISN by adding one to the proposed ISN (ACKs always inform the sender of the ... hap-pen all the time in the real world of networking.At the end of the session, there are really two “connections” between wincli2 and bsdserver. The FTP session rides on top of the TCP connection....

The Illustrated Network- P35 pptx

... (DOS).Sockets for Windows The pressure that led to the development of the WinSock interface is simple to relate. Users wanted to hook their Windows-based PCs into the Internet. The Internet only understands ... as the Unix operating system handles that. With Windows applications written for the WinSock DLL, all of the TCP/IPprocesses worried about the decision of whether to run or pause, since the ... made their way back and forth across the network just to echo “TEST” from one system to another. Only two of the packets actually do this, as the rest are TCP connection overhead.But the real...

The Illustrated Network- P44 pptx

... portion of the Ethereal capture of the packet stream, detailing the UDP con-tent inside the IP packet.FIGURE 16.2Multicast packet capture, showing the MAC address format used and the port in the ... indicates the number of bits that is signiﬁ cant in the following preﬁ x. There is no length ﬁ eld for this list that ends the Update message. The number of NLRIs present is derived from the known ... 15.7. There are four ﬂ ag bits, four unused bits, and then an 8-bit Attribute Type code.There are other attribute codes in use with BGP, but these are not discussed in this chapter. One of the...

The Illustrated Network- P54 pptx

... contrast to the text ﬁ les used in most Unix DNS versions (as shown in Figure 19.4). The Ethereal capture in Figure 19.5 shows the utter simplicity of the DNS message exchanges. There’s even ... "named.local";}; The two zone statements only point to the root servers on the Internet (in the hints ﬁ le named.ca) and make this server the master for its own loopback address. These two zones ... “com.” CHAPTER 19 The Domain Name System 501This is the root of the entire “.com” Domain Name Space (note that we ask for com. and not .com without the ending dot). Otherwise, the system would...

The Illustrated Network- P65 pptx

... the Internet (1). At the lowest branches of the tree are the MIB objects themselves. These are organized into MIB-I (the original SNMP deﬁ nitions) and MIB-II (extended SNMP deﬁ nitions). The ... various objects in the managed device. The exact function and meaning of an object, and the relationship of one object to another, is described in the MIB for the managed device. The MIB is a crucial ... shows the SNMP messages and details. One response is of particular interest the one that has the infor-mation we entered on the router. Most of the information displayed at the start of the show...

The Illustrated Network- P82 pptx

... 170–79 Ethereal interpretation of ﬁ elds, 169 ﬁ elds, 168, 169 Flags ﬁ eld, 171 Fragment Offset ﬁ eld, 171 Header Checksum ﬁ eld, 172 Header Length ﬁ eld, 171 Identiﬁ cation ﬁ eld, 171 illustrated, ... changes, 183–84 Extension Headers, 184 Flow Label ﬁ eld, 181, 183 Hop Limit ﬁ eld, 182 illustrated, 181 Illustrated Network, 166–67 IPv4 header comparison, 182–84 Next Header ﬁ eld, 182Index ... elds, 444 architecture, 444 as BGP shortcut, 443 domains, 446, 448 egress router, 446, 451–52 Illustrated Network, 432–33 ingress router, 446, 450 label stacking, 444, 448–99 label values,...

The Illustrated Network- P83 pptx

... authentication, 636, 637–38 basics, 636–37 clients, 636, 639 as client–server protocol, 636 conﬁ guration ﬁ les, 640 Ethereal capture, 655 features, 637–38 FTP and, 647 host key, 640 Illustrated ... 42–43 in applications layer, 41 illustrated, 43 interfaces, 11TCP/IP layers, 14, 26–27, 30–41 application, 30, 41 contents, 25 data link, 30, 32–35, 84–86 illustrated, 26, 44 interface, ... categories, 26 ﬂ exibility, 27 illustrated, 44 open, 25 peer protocol, 54 standards, 17TCP/IP Sockets in C, 311, 406Telnet, 59Termination of communications, 15Tethereal MAC addresses, 229Third-party...

Tài liệu LoopStar® 722 A Flexible, Cost-Effective Solution for Extending the Metro Network—Further pptx

... sub-tend off the larger LoopStar 750. The LoopStar 722 offers a combination of fixed configurations and an option slot, and provides the same software base and feature set as the LoopStar 750. ... Solution for Extending the Metro Network—FurtherApplication Diversity The high-performance LoopStar 722 edge platform can reach across any type of network (SONET/SDH, Optical Ethernet, CWDM/DWDM, ... to deliver uniform high-speed Ethernet and TDM services to multiple locations, whether located on the provider’s network or off. Applications include:• Metro Ethernet private line or multi-point...

Báo cáo hóa học: " Research Article An MC-SS Platform for Short-Range Communications in the Personal Network Context" pptx

... are other beneﬁts of the single-chip designs. For these reasons, the zero-IF approach waspreferred and the MAXIM MAX2829 chip was used as the heart of the RF part of the design. Besides, the ... index parameters. The MAC frame prepared by at-taching the MAC header and the payload is then sent to the transmitter for the transmission over the air. The transmitter block puts these frames into ... baseband veriﬁes the frame for the command or the data. The command frames are forwarded to the DME blockand the data frames are passed to the FCSL block. The receiver block coordinates the packet...

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