user@pc:~$ dig +short SRV _xmpp-client._tcp.gmail.com

20 0 5222 talk3.l.google.com.
20 0 5222 talk4.l.google.com.
5 0 5222 talk.l.google.com.
20 0 5222 talk1.l.google.com.
20 0 5222 talk2.l.google.com.

everything seems to be ok.  start kopete – add account – Jabber

basic setup -> jabber id: user@googlemail.com
Connection -> check “Use protocol encryption (SSL)” , “Allow plain-text password authentication“, “Override default server information: talk2.l.google.com Port:5223”

I’ve decided to get my CCNA CCAI (Certified Cisco Academy Instructor) certificate so I’ll be studying for next two months and try to preparemyself for fasttrack. here, You’ ll be able to see my progress and my first step is to revise my knowledge in subnetting.

you can download very nice pdf here and here.

Page is in croatian language (for $ divide number with 4,5) but feel free to check it out at here.

edit and copy-paste at the end of the file /etc/sysctl.conf

net.ipv4.tcp_no_metrics_save=1
net.core.rmem_default=65536
net.core.wmem_default=65536
net.core.rmem_max=52428800
net.core.wmem_max=52428800
net.ipv4.tcp_rmem = 8192 750000 52428800
net.ipv4.tcp_wmem = 8192 750000 52428800
net.ipv4.tcp_reordering=20
net.ipv4.tcp_timestamps=1
net.ipv4.tcp_window_scaling=1
net.ipv4.tcp_sack=0
net.ipv4.tcp_moderate_rcvbuf=1
net.ipv4.tcp_congestion_control = cubic
net.ipv4.tcp_adv_win_scale=9

save file, exit and reboot your machine 🙂

p.s. tnx to Popaj

cool article located here

dynamips
packet tracer
boson netsim

see on youtube

learn all about it here.