Search for	Example	Results
A single word	`cat`	Topics that contain the word "cat". You will also find its grammatical variations, such as "cats".
A phrase. You can specify that the search results contain a specific phrase.	`"cat food"` (quotation marks)	Topics that contain the literal phrase "cat food" and all its grammatical variations. Without the quotation marks, the query is equivalent to specifying an OR operator, which finds topics with one of the individual words instead of the phrase.

Search for	Operator	Example
Two or more words in the same topic	`AND` `and` `+` (plus symbol) `&` (ampersand)	`cat AND dog` `"cat food"+milk` `"cat food"&"dog food"`
Either word in a topic	`OR` `or` `\|` (pipe)	`cat OR dog` `cat \| dog`
Topics that do not contain a specific word or phrase	`NOT` `not` `!` (exclamation point)	`NOT cat` `! dog`
Topics that contain one string and do not contain another	`^` (caret)	`cat ^ mouse`
A combination of search types	`( )` parentheses	`cat + (dog \| mouse)` `cat \| dog + (! mouse)`

Network Node Manager i Software10.30

Administer > Managing Overlapping IP Addresses in NAT Environments > What is NAT?

What is NAT?

Network Address Translation (NAT) is typically used to interconnect a local network to the external (public) Internet. Specifically, NAT translates IP header information, substituting external (public) addresses for internal addresses in IP packets that need to transit the public network. NAT accomplishes this by providing either a static or dynamic external IP address. Network Address Translation is used as an Internet security measure, by never using the sender’s IP address for Internet access.

Network Address Translation technology was developed as a solution for the ever-increasing need for more IPv4 addresses. Certain ranges of IP addresses (described in RFC 1918) are designated as internal only, in other words, not routable over the Internet. Anyone can use those addresses for private networks, reducing the number of public addresses that must be purchased.

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