{"id":73,"date":"2008-06-14T16:53:44","date_gmt":"2008-06-14T20:53:44","guid":{"rendered":"http:\/\/www.cchsu.com\/art-en\/?p=73"},"modified":"2008-06-14T16:53:44","modified_gmt":"2008-06-14T20:53:44","slug":"troubleshooting-network-connectivity-4","status":"publish","type":"post","link":"https:\/\/www.cchsu.com\/art-en\/2008\/06\/14\/73\/","title":{"rendered":"Troubleshooting Network Connectivity (4)"},"content":{"rendered":"

Most people mix\u00a0“network connectivity” and “working browser” together, which means,\u00a0if they can’t use their browser to browse the internet, they will say that they are not connected.\u00a0 And yes, they e-mail tech support complaining that they don’t have network connectivity.<\/p>\n

Alright, customers are always right.\u00a0 So it’s the little peon’s job to figure out what they are really complaining about.\u00a0 Top reasons for a non-working browser are<\/p>\n

    \n
  1. DNS service is down<\/li>\n
  2. Infected by malware<\/li>\n
  3. The home page web site\u00a0is down<\/li>\n
  4. Protection software conflict<\/li>\n<\/ol>\n

    First and most is the DNS service is down.\u00a0 DNS servers are responsible to translate human-readable names to actual IP addresses.\u00a0 For example, translate www.cchsu.com<\/a> to some IP address that can be used by machines to do their jobs.\u00a0 Your ISP typically maintain a DNS service for you, and as you all know, it’s just as reliable as your DSL\/cable service, which means it can be down.\u00a0 For some ISPs that I used to use, it can be as frequent as twice a day, although each time the down time is roughly 10 minutes.\u00a0 As a result, it is important that you write down the DNS servers’ addresses<\/em><\/strong> so that you can ping or tracert to see if you can reach them.\u00a0 If the DNS servers are down, all that you can do is waiting.<\/p>\n

    Let’s summarize what we have now:<\/p>\n