Tcpdump as is powerful tool that allows us to sniff network packets and make sure some statistical analysis out of those dumps. One major drawback to tcpdump is the size of the flat file containing the text output. But tcpdump allows us to precisely see all the traffic and enables us to create statistical monitoring scripts.

A protocol analyzer or packet analyzer is a hardware or software tool used to intercept digital communications occurring over a portion of a network.

Examples of packet analyzers (hardware and software) products are:

Wireshark (Ethereal)

tcpdump

Netscout

snoop

From my experience, network security analysts should have the following character traits:

Honesty

Curiosity

Trustworthiness

Persistence - not easily discouraged

Humility, i.e. willingness to admit ignorance coupled with a commitment to find the answer

Discretion

In addition, a network security analyst should also have the following Non-character traits:

Intelligence

Extensive knowledge of computer security, especially the applicable laws, policies and procedures that apply to the network they are working with

Skill on methods for securing computers and computer networks

Skill in using network analysis tools such as Nessus, Snort, Netcat, Metasploit, Kismet, or tcpdump. There are lot of them, but a good analyst is skilled with enough of them to do his or her job well.

Understanding of the operating systems and applications in use on the network

Skill in database security if a DB is present on the system.

Skill in router and switch administration and security.

Skill in Intrusion Detection Systems (IDSs) and Intrusion Prevention Systems (IPSs)

Resources to identify people who have any skills that they lack - for example, if they don't have sufficient skills on routers and switches, they should be able to identify someone with those skills to team up with.

Step involves

1). Buy antivirus online & install

2). Use a firewall

3). Befriend strong passwords

4). Update your security software for internet security & computer safety.

5). Be cautious of clicking links in email or instant messages

6). In fact, be wary of clicking links, in any space

7). Bookmark important sites.

Stay secure with the updated version of antivirus software online from renowned brands like K7 antivirus software.