ccna networking basics

From today on we review together to learn the debugging of routers and switches. Based on the CCNA tutorial, we practice a few small commands every day, and make up a little, and finally become an amplifier.Enable: Enter privileged mode and the command prompt becomes hostname# after runConfigure Terminal: Enter the global mode command prompt to change to hostname (config) #Hostname: Naming the deviceExit quit PrivilegeNo IP domain-lookup: Turn off add

Today continue to share some commands for the router's basic configuration. First look at our future configuration routing, partition VLAN used topology diagram, in the future we will use this topology map to complete the later experimental 650) this.width=650; "title=" capture.jpg "src=" http://s3.51cto.com/ Wyfs02/m01/6c/7d/wkiom1vkidjg8lilaadnhwbhx8e751.jpg "alt=" Wkiom1vkidjg8lilaadnhwbhx8e751.jpg "/>The commands we want to share today are:Line console 0 enters the debug port,Logging SYN Clo

/wKioL1hkgsLBoZ-HAACH4K3ABdE060.png "title=" 3.png " alt= "Wkiol1hkgslboz-haach4k3abde060.png"/>These are just the basics of OpenStack neutron network components, the content is too much, involving a lot of knowledge points such as Liunx Bridge tap device Virtual to namespace openvswitch Virtual Switch virtual router Iptables High-availability DVR and so on, including I have a lot of things to learn, but you do not have to fear, from the simplest lear

spending, resulting in insufficient balance of the case of the deduction of money)Workaround: Add a synchronization method with the synchronized keywordFor example private synchronized void Makewithdrawal (int amount) {}Description: Each object is a lock with only one key per lock. Usually the object is not locked, only to see the synchronized synchronized method will be locked, the goal of synchronization is to protect important data, the actual lock is the method of accessing data. The key wi

OSI Reference Model, the unit of information exchanged between the peer layer protocol is called the Protocol Data unit (PDU, Protocol data unit).Each layer in the OSI Reference Model relies on the services provided at the next layer.In order to provide services, the lower layer of the PDU as the level of data encapsulation, and then added to the head (and tail) of the layer. The header contains the control information needed to complete the data transfer.In this way, the process of data submis