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 alway...

Ngày tải lên: 04/07/2014, 07:20

... (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/IP processes worried about the decision of whethe...

Ngày tải lên: 04/07/2014, 07:20

... portion of the Ethereal capture of the packet stream, detailing the UDP con- tent inside the IP packet. FIGURE 16.2 Multicast 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 presen...

Ngày tải lên: 04/07/2014, 08:20

... 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 loopba...

Ngày tải lên: 04/07/2014, 08:20

... 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 dev...

Ngày tải lên: 04/07/2014, 08:20

... 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 bas...

Ngày tải lên: 04/07/2014, 08:20

... 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 Heade...

Ngày tải lên: 04/07/2014, 08:20

... 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, 11 TCP/IP layers, 14, 26–27, 30–41 application, 30, 41 contents, 25 data link, 30, 32–35, 84–86 illustrated, 26, 44...

Ngày tải lên: 04/07/2014, 08:20

... 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—Further Application Diversity The high-performance LoopStar 722 edge platform can reach across any type of network (SONET/SDH, Optical Etherne...

Ngày tải lên: 10/12/2013, 19:15

... are other benefits of the single- chip designs. For these reasons, the zero-IF approach was preferred 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...

Ngày tải lên: 22/06/2014, 06:20