SSH access only from the PC1 by ASA
PC1 can access from the outside, and dmz zone site, the host can access the DMZ from the Out area of the Web site
PC1 can ping from the host through Out
Class wiring is a support of 100 ohm twisted pair cabling up 600MHz bandwidth, the standard transmission. September 1997 ISO / IEC cabling standards identified seven types of research and development, starting from the seven types of standard cabling history there and “RJ-type” and “non-RJ” type interface division. As the “RJ-type” interface now reach 600MHz of bandwidth, seven types of standard no final conclusion, the current international standards are actively discuss seven categories of the draft. But in July 1999, ISO / IEC received a non-RJ category Simon TERA interface standard, and was finalized in July 2002 for the seven categories of Simon’s TERA non-RJ interface to. RJ is the acronym for Registered Jack, in the FCC (Federal Communications Commission standards and regulations) is described in the Public Telecommunication Network RJ contact interface, commonly used with RJ-11 and RJ-45, RJ-45 computer network is a standard 8-bit module of interface known in the past four, five, five categories including the newly released super six cabling, the RJ-type interfaces are used.
1, important information must be backed up. Data is the most important, the program can be re-damaged COPY, or even buy one, but his type of information may be three years of accounting data may be painting a picture for three months, the results one day, bad hard drive or because the virus damages the information will make people tears.
Computer Repair also the following basic methods, the following can be flexibly applied as a general computer problems can be easily resolved.
Do not know if you have encountered bios which can detect the hard disk, but you boot from a floppy disk and hard disk are not the computer’s case? Maybe this time you will think hard disk is broken, can in fact, most likely your hard drive in the logical lock.
Fault 1: sound card quiet
Common causes of such failures occur are:
1. Driver default output is “mute.” Click the bottom right corner sound small icon (a small loudspeaker), there volume control slider, below the “mute” options, click the check box front, remove the checkmark box, you can pronounce correctly.
Recently, a friend just did not take long for computer equipment to a problem: “computer startup sound, sound card driver and reinstall the operating system will not work.”
IE as an important part of the Window System, use the most is also the most troublesome local, the following is found in the course of the author and to address the four typical faults.
Fault 1: can not change the level of IE safe
1, the virus
Some viruses attack will take up a lot of memory space, causing the system out of memory problems. Quickly to anti-virus, virus database update, and then anti-virus measures do a good job!
ARP attacks off network failure
Symptoms: local area network computer can access a large area, QQ there dropped
Symptoms Resolution: This is the most common way of ARP virus attacks, and now many virus attacks will affect the use of such ARP LAN, such as robotic dog virus, once infected machines within the LAN, some computer access to the Internet will not work there situation, and open the page intermittent.
