On the switch，There are three commonly used configuration mode，Respectively Access (Access)，Trunk (trunk or trunk) as well as Hybrid (Hybrid)，These three interfaces operating mode determines the corresponding interface for processing the attitude data packets on the switch。Nowadays，Routing to elaborate on these three models。
Since the switch has divided the virtual LAN VLAN function is，So it[……]
Many people want to build one of their ownWIFI_WEBCertified Network，The main technology used is Portal (Portal），It can authenticate legitimate users through WEB page。Through this technology to do a certified third-party solutions haveWIFIAP、WIWIZ，Both companies are more representative。According to my investigation，Wah also Portal Solutions，Cisco alone I have not found a correlation[……]
The first run on a Windows systemAll in One的GNS3when，Have a variety of configurations setup wizard，In the testdynamipsWhen prone to "Analyzing dynamips version fails"Prompt，A lot of people stuck in here at a loss。- I have encountered this problem。
Out of the Internet，Find information related to a good few，It was agreed that as long as the installedwinpcapEverything will be fine[……]
Today came across configurationDHCP relayThe problem，Suddenly I found that I had actually not noticed，Even sometimes do not know how to engage，And later I had to Google it very awkward ......，Now recorded as follows：
I was not on the map topology，Simple words to describe：
R1(f0/1)————-(f0/1)R2(f0/0)——S1——PC0
[……]