The TTL tells a DNS server how long it is allowed to cache a DNS record. Caching is a standard feature in the DNS. When one DNS server queries another DNS server for a record, it is allowed to store the answer in its local memory cache for the number of seconds specified by the TTL value. Only after the TTL has expired will the caching server repeat the query to get a fresh copy of the DNS record from the authoritative server.

DNS records are cached on the Internet DNS servers after the IP address is found. TTL is the amount of time that a DNS record for a host will remain in the cache of a DNS server after it has found the IP address of that host or server. The TTL on the Smart DNS server can be adjusted through the user interface.

In order be able to make short-term changes, the TTLs should be adjusted rather short. 30 or 60 seconds seem to be appropriate values.

TTL settings allow you to control how long objects stay in your cache. They should be set according to object type to maximise the efficiency of your cache. Hypertext (.html) objects should have a low TTL while most others can be set higher. If you do not use TTL settings, pages may become outdated in the cache. Your customers will realise this and reload pages in order to ensure they have up-to-date data, defeating the purpose of having a cache.

freshclam attempts to detect potential problems with DNS caches and switches to the old mode if something looks suspicious. If this message appears seldomly, you can safely ignore it. If you get the error everytime you run freshclam, check your system clock. If it is set correctly, check your dns settings. If those didn’t help, try putting this at the top of your cronjob: host -t txt current.cvd.clamav.

TTL stands for Time To Live. All IP packets have a TTL field and as IP packets get passed around the Internet, this TTL value is decreased, usually by one at every hop. If this field ever gets down to zero, the IP packet is discarded and does not reach its destination. What this means to you is that if you ever try to connect to a site on the Internet that is at a hop level greater than your TTL, your connection will fail.

That's set to 5 minutes. If you don't know what DNS time to live is, you don't need to worry about it. It simply means that in the worst case scenario, it will will take about 6 minutes total to see changes or updates you make to your host. That's time to live (waiting for your local DNS caches to expire the record) plus waiting for our database regeneration script to do it's thing.

The DNS TTL specifies the number of seconds that a nameserver may cache a DNS entry before refreshing it from its forwarder (or ultimately, the originating) DNS server. The lower the TTL is, the prompter an IP address change will be visible world-wide. But because the entries are cached for a shorter time, more traffic will occur on our DNS server. The DNS TTL should be chosen depending on how often an IP address changes and how important it is to have that change visible within a short time.

DNS is the acronym for Domain Name System, and it is a distributed database, based on a client/server model. A DNS manages the translation of a domain name into an IP number (the so-called name resolution), and vice versa that of an IP number into a domain name (the so-called inverse resolution).

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A record is part of the zone file and is used to point Internet traffic to an IP address. For example, you can use an "A record" to designate "www.yourdomain.com" to send traffic to your web site at IP address 209.132.X.XX. You can also designate "xyz.yourdomain.com" to go to a separate IP address.

This message can be produced by any application linked to the WFDB library that attempts to read annotation files. In order to do so successfully, these applications need to find the annotation file for the annotator and input record you specify. The message indicates that the annotation file was not found in any of the expected places, or that it was unreadable. There are several common reasons why this can happen: The record name supplied to the application is not correct.

DNS stands for Domain Name System. The DNS is a record, located at the registry, that converts IP addresses from numbers into names, i.e. 123.456.789.0 to www.yourdomain.com. This record tells a browser where your web site is located and also tells mail servers where to route your mail to. If the DNS isn't set-up properly your domain name won't work.

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DNS is an acronym that means Domain Name Server. A DNS is similar to directory assistance with the telephone company. You give the DNS a URL (i.e. words) and the DNS converts it to an Internet Protocol (IP) address (i.e. numbers). When you get an error, it can mean a number of different things. The site's server may be unavailable, the address may be typed incorrectly, or the connection may have timed out (server did not respond in a preset amount of time).

DNS stands for Domain Name System, or a large system which answers questions about DNS lookups. If you host a domain with rydia, whenever anyone in the world punches your domain name into their browser, the browser will need to figure out what IP address our server has. So it asks its local DNS server, which doesn't know, then asks the root DNS servers, which don't know, which then ask our DNS server, which tells them what it is.

The most common mechanism for resolution on the Internet is the Domain Name System (DNS): http as used in URL is a use of DNS. URLs are grouped by domain name and then by some hierarchical structure, originally based on file trees, now possibly unconnected from that but still a hierarchy. DOI names offer a more finely grained approach to naming where each name stands on its own, unconnected to any DNS or other hierarchy.

A real-time signal is continuously being sent and received, with little or no delay, much like a newscast or program on TV. Near-real-time is delayed slightly because a communication link is established to send the data once an event occurs, much as one makes phone call to someone in order to give them a message.