>-----Original Message-----
From: [EMAIL PROTECTED]
>[mailto:[EMAIL PROTECTED]]On Behalf Of Tomohide Nagashima
>Sent: Monday, 26 March 2001 12:58
>To: [EMAIL PROTECTED]
>Cc: [EMAIL PROTECTED]; [EMAIL PROTECTED];
>[EMAIL PROTECTED]
>Subject: Re: what is a site?
>
>
>Hello,
>
>>we also don't need any specific definition of
>>what is a site - all that can possibly do is to constrain
>thinking into
>>the future.
>
>As I also think we should not constrain concept of site. But I
>belive we
>still need some minimun defenition of site, or need some
>example that show
>such a set is site or not.
>
>For example, how about it?
>
>There is a company that has two sets of network in two place.
>As each network is too far, this company get connectibity from
>two ISPs( ISP1 has prefixes in TLA1, ISP2 has prefixes in TLA2).
>And this company want to communicate this two network without
>Grobal network, this company connect this two network with
>released line. like this;
>
> [TLA1] [TLA2]
> | |
><NLA1-1>-----<NLA2-1>
>
>( NLA1-1 is from TLA1, and NLA2-1 is from TLA2 )
>
>then can we call a set of NLA1-1 and NLA2-1 is a site ?
>
>From my opinion this can be a single site or two sites, it's just an
administrative term in network management.
My definition of a site is a computer network, that can exist of one or more
links that all have there own services and would be able to preform it's
basic functions without the need of an additional site. Probably here it's
get complicated and this is were others may disagree.
For me, sites exist for reasons of security (e.g. high-security envorment
connected to an other network), network load balancing (e.g. distributing
servers or slow links) or any other reason. Most sites are on a specific
geographic posisition, but this usually has todo with the slow links between
the sites.
Note here that I'm not saying that two (or more) links that are separated by
a big space
I rather use the term link instead of network to identify a line where one
or more computers are connected to AND where they all have direct access to
each other without the need to go through a router or proxy.
Note that I don't treath hubs and switches as such routers, but just a part
of the link.
[TLA1] [TLA2]
| |
<NLA1-1>----slow-line----<NLA2-1>
As a illustion with the same meaning as above, I would threat this as one
site if all systems for authentication, DNS, DHCP (examples) and other
direct requirements for the network are all located on [TLA1]. Instead if
they have both the services then they COULD be two sites (it would seem
sense, but it's not nescesary to me).
Note that the services may be the same, the authentication server on [TLA1]
may be relicated with [TLA2]...
>I belive that this set is not a site but two sites.
>but if we define site is whatever I want it to be,
>then someone will regard this a set of two networks is a site.
>
>----
>Tomohide Nagashima
>[EMAIL PROTECTED]
>
- Joris
[EMAIL PROTECTED]
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