[mod][root][needs init.d enabled kernel]
Change Hostname:
<pre><code>
$ su
# vi /system/etc/init.d/99hostname
</code></pre>

Type in
<pre><code>
#!/system/bin/sh
setprop net.hostname tablethostname
</code></pre>

Save the file, reboot.
----------------------

[mod][root]
Change System DNS Servers:
<pre><code>
$ su
# vi /system/etc/resolv.conf
</code></pre>

If the file does not exist or is empty, just create it.

Type in
<pre><code>
nameserver 8.8.8.8
nameserver 8.8.4.4
</code></pre>

Those are google DNS servers, or specify your own.
Save file, possibly reboot tablet.
----------------------