Linux Network Foundation, comprehensive actual combat test questions

1. How can the LAN machine not be able to solve the Internet?

Interview questions: As the Enterprise network management, a local area network machine can not access the Internet, please give detailed troubleshooting ideas?

(a single machine cannot surf the internet, others can surf the internet)

Example of a Windows 62-digit customer: How to Troubleshoot

A ping www.baidu.com high speed has no repair pass

If the same, but not yet the Internet: may be browser, poisoning and other issues

B Ping Gateway

The goal is to exclude physics (link network lines, network cards, drivers, IP settings, etc.)

If the ping gateway does not work, view the IP settings and then ping the IP or ping the other machine IPs in the network.

If ping yourself IP is not through: Check IP settings, NIC driver, physical link.

If the ping network other machine IP is through, the gateway does not let you surf the Internet, the gateway is limited.

C Ping the gateway in case, ping baidu.com, check DNS settings are correct

Check the method is, ping the public IP, see patency (usually remember a few external network IP) Ping 203.81.19.1

Host/dig/nslookup checking Domain name resolution

d Internet Router (configuration and hardware) and ISP line issues

Log in to the router, check the superior line, call the ISP technology.

e-Troubleshooting: IP address Conflicts, other people can surf the Internet, IP address conflict, ARP virus, core switch is broken,

Switch loops (see logs)

(b) Large area on the net:

Router, ISP, core switch, ARP virus, core switch broken, gateway address occupied, switch loop

2. How do I troubleshoot a slow Web site opening?

Interview question: As a Linux operation, the customer reflects your deployment of the site server access slow, please give detailed troubleshooting ideas?

This article is from the "Sandshell" blog, make sure to keep this source http://sandshell.blog.51cto.com/9055959/1948382

Linux Network Foundation, comprehensive actual combat test questions