cat5 loopback

first 64 bytes of the source data.． DescriptionThe gateway sends a redirect message under the following circumstances. A gateway (G1) receives datagrams from a gateway-connected network that checks the routing table for the address (X) of the next Gateway (G2). If the G2 and the specified receiving host are on the same network, and the redirect message is sent, this message suggests that the sending host send the datagram directly to the gateway G2, as this is closer, while the gateway G1 conti

wires as transmission media: 100Base-TX, 100Base-T2, and 100Base-T4. Among them: 100Base-T4 standard requires the use of all 4 pairs of lines for signal transmission, the other two standards only require 2 pairs of lines. The 100Base-TX standard is the most popular in Fast Ethernet. Therefore, when purchasing a m twisted pair, do not use a twisted pair with only two wires at a low cost. Category 3, category 4, Category 5, and Category 5 twisted pair wires are defined as 4 pairs in the US cable

transmission in the LAN, and complies with the IEEE 10Base-T standard. 5th twisted pair wires currently have the largest LAN market, with a maximum rate of 100 Mbps, in line with the IEEE 3u 100Base-TX standard. The main difference between Category 5 and Category 5 is the application. Only two pairs of cables are used for transmission during use of Category 5 cables. Category 5 uses four pairs of full duplex transmission to meet Gigabit Ethernet applications. Category 5 has higher performance r

labeled with "3". The outer protection rubber of five types of twisted pair wires is thick, CAT 5 is marked on the rubber cover, and "5" is marked on the outer packing cart. The price is higher than that of Category 5 twisted pair wires, which are unshielded twisted pair wires. Compared with common category 5 twisted pair wires, category 5 twisted pair wires have lower attenuation and stronger anti-interference capability when transmitting signals. In a 1/4 M network, the interference degree of

Cat-5e bandwidth is 100 MHz, cat-5e is 155 MHz, and cat-5e is 250 MHz. The single copper cores in category 5 and Category 5 are 24awg, and category 6 is 23awg. No isolation band exists in category 5 and Category 5 lines, and category 6 lines contain a word or cross isolation band. Cat5 is printed on cat5, cat5e is cat5e or 5E, and cat6 is cat6. Category 5 and Category 5 support MB of applications, Categ

routing table for the address (X) of the next Gateway (G2). If the G2 and the specified receiving host are on the same network, and the redirect message is sent, this message suggests that the sending host send the datagram directly to the gateway G2, as this is closer, while the gateway G1 continues to send the datagram forward.Because the IP source Routing and destination address fields in datagrams are optional, even better routes are sometimes impossible to discover. Code: Gateway sends 0,1

The loopback device (' loopback device ') allows the user to virtual a block device with a normal disk file. Imagine a disk device in which all read and write operations are redirected to read and write a normal file named Disk-image instead of the track and sector of the actual disk or partition. (Of course, the disk-image must exist on an actual disk, which must be larger than the virtual disk capacity.)

Features of the data link layer:Provide services to the network layer, good service interface, ensure the effective and reliable data transmission, adjust the traffic, ensure that the slow receiver is not overwhelmed by the fast sender.The protocol of the data link layer is still many, there are our most commonly used Ethernet (that is, we usually use the network card) protocol, there are less common token ring, and FDDI, of course, there are now quite popular in the domestic PPP protocol (ADSL

Experimental topologySoftware version GN3 0.8.6 ASA image 8.0 (2)650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/76/D9/wKioL1ZdmSGAvspoAABLsjqDXwk949.png "title=" 9qzzvef@]278 ' U@5uoyg) 0m.png "alt=" Wkiol1zdmsgavspoaablsjqdxwk949.png "/>Experimental environmentR1 and R2 Simulation company intranet, R3 analog Internet equipment. ASA as a company export, implementing NAT address translationExperimental requirementsDoing dynamic NAT on the ASA to convert the address of the R1

Beaglebone_black login: Root Password: Last login: Fri Dec 31 19:00:20 est 1999 on ttyo0 [Email protected] _ BLACK :~ # [Email protected] _ BLACK :~ # Pwd /Home/root [Email protected] _ BLACK :~ # Ifconfig Eth0 link encap: Ethernet hwaddr C8: A0: 30: B9: 7f: 2b Up broadcast multicast MTU: 1500 Metric: 1 RX packets: 0 errors: 0 dropped: 0 overruns: 0 frame: 0 TX packets: 0 errors: 0 dropped: 0 overruns: 0 carrier: 0 Collisions: 0 FIG: 1000 RX Bytes: 0 (0.0 B) TX Bytes:

Intranet interaction and the other for isp interaction. the actual topology is as follows: the isp line is directly connected to the vswitch, instead of the vro. The vro is also connected to a port of the vswitch. Its function is only for nat, re-encapsulate the original address of the package and the destination address of the returned package (see the original post). If the Intranet host wants to send packets to the Internet host, after these packets are sent to the Ethernet port of the route

Configure OSPF single region Target: Purpose: Configure the OSPF single-region experiment to implement simple OSPF configuration. Background description: In the topology, there are three routers with five CIDR blocks and classless subnets. Requirement Analysis: In this topology, the OSPF routing protocol is used to learn route information, and a single region is used. All routers are in Area 0. Tutorial principle: Enable the osfp process on the vro and transmit all routing information through t

This reference article is mainly used for the diffusion of knowledge points in subsequent articles, in this special backup and diffusion learning Exchange.There are three purposes of the data link layer: Send and receive IP datagrams for IP modules. Sends an ARP request and receives an ARP reply for the ARP module. Send Rarp request and receive RARP response for Rarp IP everyone has heard about it. As for ARP and RARP,ARP called Address Resolution Protocol, is the IP addres

This reference article is mainly used for the diffusion of knowledge points in subsequent articles, in this special backup and diffusion learning Exchange.There are three purposes of the data link layer: Send and receive IP datagrams for IP modules. Sends an ARP request and receives an ARP reply for the ARP module. Send Rarp request and receive RARP response for Rarp IP everyone has heard about it. As for ARP and RARP,ARP called Address Resolution Protocol, is the IP addres

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.　Orb-slam[1] completely inherited the mantle of Ptam (http://www.cnblogs.com/zonghaochen/p/8442699.html) and made two great improvements: 1) real-time loopback detection; 2) very robust repositioning. To achieve these two improvements, Orb-slam the Ptam mapping line base to local BA and global BA to split into local mapping and loop closing two t

IP addresses are divided into common addresses and special addresses. Most of the IP addresses used in the previous article are common IP addresses. This article describes how to use the ten methods provided by the inetaddress class to determine whether an IP address is a special IP address. 1. isanylocaladdress Method If the IP address is a wildcard address, true is returned. Otherwise, false is returned. This wildcard address is often used by computers with multiple network interfaces (such a

as transmission media: 100Base-TX, 100Base-T2, and 100Base-T4. Among them: 100Base-T4 standard requires the use of all 4 pairs of lines for signal transmission, the other two standards only require 2 pairs of lines. The 100Base-TX standard is the most popular in Fast Ethernet. Therefore, when purchasing a m twisted pair, do not use a twisted pair with only two wires at a low cost. Category 3, category 4, Category 5, and Category 5 twisted pair wires are defined as 4 pairs in the US cable standa

. Currently, Category 5 wires are more than Category 6 wires. The 3rd class line is commonly used for 10 Mbps Ethernet data and voice transmission in the LAN, and complies with the IEEE 10Base-T standard. 5th twisted pair wires currently have the largest LAN market, with a maximum rate of 100 Mbps, in line with the IEEE 3u 100Base-TX standard. The main difference between Category 5 and Category 5 is the application. Only two pairs of cables are used for transmission during use of Category 5 cab

I. LAN interface cable standards 10base-t: twisted pair cable, generally using RJ-45 connector; maximum effective transmission distance is 100 m from the hub, even high-quality 5 category twisted pair can only reach 150 m. The matching resistance is 120 Euro. 10base5: coarse coaxial cable with plug-in connector and baseband signal. The maximum supported length is 500 m and the maximum segment is 100. The matching resistance is 75 Euro. 10base2: thin coaxial cable. The connector uses the industr

damage has occurred. The cable cannot guarantee the cable performance. Minimum bending radius For the minimum bending radius, see the cable diameter. It is usually expressed in multiples of D (Cable diameter. The diameter of cat6 cables is generally greater than that of cat5 cables. Therefore, the actual radius of cat6 cables is generally greater than that used in cat5 cables. Comparison between cat5e an