Confused about persistent connection for old clients

Dear All,

Sorry if this is a FAQ.

I am a bit confused about persistent connection establishment with
HTTP/1.0 clients.

Section 8.1.3 says:
"A proxy server MUST NOT establish a persistent connection with an
HTTP/1.0 client".

Excerpt from section 19.7.1:
"An HTTP/1.1 server may also establish persistent connections with
HTTP/1.0 clients upon receipt of a Keep-Alive connection token."

Why is there difference in handling persistent connections for proxy
servers and for HTTP/1.1 servers?

Thanks in advance,
Bertold

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 Kolics, Bertold                             E-Mail: bertold@tohotom.vein.hu
 University of Veszprem, Hungary        W3: http://tohotom.vein.hu/~bertold/
 Information Engineering Course
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