db25 loopback

The meaning of the HTTP protocol status code is mainly divided into five categories, which are generally:~~~~~~~~~~~~~~~~~~~~~~~~~~~~1XX reserved2XX indicates that the request was successfully received by3XX request further refinement of requests for completion of customer requests4XX Customer Error5XX Server Error ContinueIndicates that the client should continue the request. Loopback is used to notify the client that this request has been received

:1500 metric:1 RX packets:3058 errors:0 dropped:0 overruns:0 frame:0 TX packets:2715 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:355994 (3 47.6 KiB) TX bytes:263751 (257.5 KiB) lo Link encap:local Loopback inet addr:127.0.0.1 mask:255.0.0.0 Inet6 addr::: 1/128 scope:host up LOOPBACK RUNNING mtu:65536 metric:1 RX packets:12 errors:0 D ropped:0 over

and recording devices, the next step is to turn on the device connection and manage the traffic on that connection. WASAPI allows applications to create and manage audio streams. The application can use WASAPI to implement rendering a stream, capturing a stream, and loopback recording. We can use loopback recording to achieve the system recording function, to achieve the "record what you hear" purpose.In

: Neighbor table: All routers that the router considers to have a neighbor relationship with itself will appear in this table. Only when a neighbor table is formed can the router learn the network topology from other routers. Topology table: After a router establishes a neighbor table, the router running the OSPF routing protocol will notify each other of the network topology they know to create a topology table. In a region, all routers should form the same topology. The router can use the SPF

an LSA copy to all other neighbors of the ROUTER.5. spread to the entire region through LSA. All rourers form the same link status database.6. When all the ROUTER databases are completely the same, Each ROUTER uses itself as the root and uses the SPF algorithm to calculate a non-loop topology. To describe the minimum path cost that it knows to reach every destination.) This topology is the SPF algorithm tree.7. Each router will build its own route selection table from the SPF algorithm tree. No

1. The link layer is also called the data link layer or network interface layer. It usually includes the device driver in the operating system and the network interface card corresponding to the computer. They work together with the physical interface details of cables (or other transmission media.The link layer has three main purposes: (1) sending and receiving I p datagram for the I P module; (2) Sending A R P request for the R P module and receiving A R P response; (3) Send the r a p request

; 127.0.0.1 Server: 127.0.0.1 Address: 127.0.0.1 #53 1.0.0.127.in-addr. arpa name = localhost. > Exit [Root @ localhost etc] #/etc/rc. d/init. d/named stop Stop named: [OK] Iii. Modify the network configuration script file (/etc/sysconfig/network-scripts/ifcfg-eth0 ): [Root @ localhost ~] # Cd/etc/sysconfig/network-scripts/ After modification # Advanced Micro Devices [AMD] 79c970 [PCnet32 LANCE] DEVICE = eth0 BOOTPROTO = static HWADDR = 00: 0C: 29: 65: 21: 05 BROADcaST = 192.168.1.255 IPADDR = 1

assigns a static IP address and eth1 dynamically obtains the IP Address: # This file describes the network interfaces available on your system # And how to activate them. For more information, see interfaces (5 ). # The loopback network interface Auto lo Iface lo inet loopback # The primary network interface Auto eth0 Iface eth0 inet static Address 192.168.1.254 Network 192.168.1.0 Netmask 255.255.255.0

Site to site VPN Experiment1.1 descriptionThis experiment uses two routers to test the VPN configuration. Of course, you can also use a PC to a vro, a PC to a VPN concentrator, or a PC to a firewall. All of these support VPN. While we use IPsec VPN in VPN is more secure and reliable.1.1.1. Experiment descriptionWhen preparing an ipsec vpn, follow these steps:1. R1 sends incoming traffic to R2 (sets the incoming traffic to ACL)Ii. R1 and R2 negotiate IKE phase 1 (phase 1)* Determine the Key Distr

Configure several experiments in a single OSPF area. 1. Configure the routing interface to start the OSPF process on R1, and configure the Router ID and the interface R1 (config) that runs OSPF) # router ospf 1R1 (config-router) # router-id 192.168.2.1R1 (config-router) # network 10.0.0.0 0.0.0.3 area 0R1 (config-router) # network worker 0.0.0 0.0.3 area 0 starts the OSPF process on R2, and configures the Router ID and the interface R1 (config) that runs OSPF # router ospf 1R1 (config-router) #

suzhou; create table sz (id int not null identity () primary key, orderno char (20) not null, ordertime datetime not null default getdate (), remark varchar (200) gocreate table sz (id int (11) not null, orderno char (20) not null, ordertime datetime (6) not null, remark varchar (200), primary key (id) engine = innodb default charset = utf8; --- 5. create LOOPBACK -- create loopback server link EXEC sp_add

= 192.168.5.188; DATABASE = suzhou; UID = root; PORT = 3306; ', @ catalog = NULLexec sp_add1_srvlogin @ rmtsrvname = 'jt', @ useself = 'false', @ rmtuser = 'root', @ rmtpassword = 'Password '; select * from openquery (jt, 'select * FROM sz; ') GOUSE [master] GOEXEC master. dbo. sp_serveroption @ server = n'jt ', @ optname = n'rpc out', @ optvalue = n'true' GOEXEC master. dbo. sp_serveroption @ server = n'jt ', @ optname = n'remote proc transaction promotion', @ optvalue = n'false' GO --- 4. sql

In Ubuntu, I configure virtual IP addresses to achieve high availability. Next, let's take a look at how to set virtual IP addresses in Ubuntu12.04. First, let's take a look at my Ubuntu IP address: www.2cto.com [plain] chenshu @ sloop2 :~ $ Ifconfigeth0... configure the virtual IP address in Ubuntu. the purpose of configuring the virtual IP address is to achieve high availability. Next, let's take a look at how to set the virtual IP address in Ubuntu12.04. First, let's take a look at my Ubuntu

then passes through each layer one at a time until it is sent to the network as a stream of bits, each of which adds some header information to the received data.Link LayerThere are three main purposes of the link layer: Sending and receiving IP data for IP modules; Send ARP request and accept ARP reply for ARP module; The outer RARP sends RARP requests and accepts RARP responses. Loop-Back interfaceThe loopback interface allows

translator presses: that is, either the transit interface activates MPLS).This case shows how to: on the ingress router (R1), use R7 's loopback port address (10.0.9.7) to define an LSP from R1 to R7. 10Mbps bandwidth is reserved for MPLS in the following configuration. Additionally, this configuration disables the CSPF algorithm to ensure that the rsvp-signaled LSP used by the host C1 and C2 is consistent with the shortest path to the IGP network.Co

(config) #int loopback 0R1 (config-if) #ip add 192.168.1.1 255.255.255.0R1 (config-if) #exitR1 (config) #int s0/0/0R1 (config-if) #ip add 12.1.1.1 255.255.255.0R1 (config-if) #no shR1 (config-if) #exitR1 (config) #int tunnel 0// create tunnel tunnel 0R1 (config-if) #ip Add 1.1.1.1 255.255.255.0// Configure tunnel IP addressR1 (config-if) #tunnel source s0/0/0// Specify The origin port of the tunnel tunnelR1 (config-if) #tunnel destination 23.1.1.1//

127.0.0.0 to 127.255.255.255. Where 127.0.0.0 is a reserved address,127.0.0.1 to 127.255.255.254 is a special address, it is a local loopback (loopback) address, a local loopback address, and does not belong to any one of the class address classes. It represents the local virtual interface of the device, so the default is to be considered an interface that will

Lab question: R2 is connected to R3 R5 as a fast Ethernet cable, and the others are strings. Frame relay is a full-connection mesh structure by default, that is, the PVC between all connected routes has been connected, and all Disable the reverse ARP functions of R5 and R8 to manually configure the map from R5 to R8. The topology used in this experiment is the ccnp standard topology, as shown below: Certificate ----------------------------------------------------------------------------------

read/write in external PHY mode. 2-1: LBK: loopback mode (loopback) 00 usually, 01mac internal loopback, 10 Internal phy m Digital loopback, 11 retained. 0: RST: 1 software reset, automatically cleared after 10 us. NSR (01 H): Network Status Register) 7: Speed: Medium Speed. In the internal PHY mode, 0 is 100 Mbps, an

parties can perform dynamic negotiation on the I p address (UseI p Network Control Protocol); (4) similar to c s l I p, the header of t c p and I p packets is compressed; (5) the Link Control Protocol canSet multiple data link options. The cost for these advantages is to add three bytes at the beginning of each frame.Several frames of negotiation data must be sent when establishing a link, and more complex implementation is required. Slip users have more advantages than PPP users, but in the