NEC PowerMate Professional 9000E Series User Manual page 247

Why do I sometimes have trouble retrieving email and
accessing a website?
First, make sure you are logged onto the network and your
password entries are correct.
There are many reasons why a site may take longer to come
up than others. The most common reason is that the site has
many visitors, causing a delay in processing your request for
access.
If a system on the network is running extremely slowly,
check to see which network protocols are enabled. Disabling
any protocols that aren't needed can enhance performance.
(The system polls for incoming data using each protocol that
is enabled. Individually, any enabled protocol slows things
down. A lot of protocols really slows down the system.)
C-14 Questions and Answers