My Netwok Dictionary

WEP is the first and the lowest standard of wireless security. You will hear security experts say that WEP can be cracked in 5 minutes, which is true, that once you’ve sniffed the traffic network sufficient to weak IVs. WEP can be cracked, because it uses the same key for each data frame, so with enough traffic, you can capture the key. WEP is more difficult to crack because firmwares update to help prevent the transmission of data packets small.

WPA (Wi-Fi Protected Access) is the improved version of WEP. WPAs main response to the vulnerability of WEP is that instead of using the same key for each data frame it changes the keys. The key rotation is in much more difficult for a hacker to enter the key shared together. WPA also allows wireless clients to roam from access point to access point while working in a corporate environment over effectively. Read the rest of this entry »

A computer network can serve several different purposes:

• The sharing of resources (files, applications or hardware, internet, etc…)
• Communication between people (email, live chat, etc…)
• The communication (between industrial computers for example)
• The guarantee of uniqueness and universality of access to information (databases, networks)
• The multiplayer game

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Internet offers, in addition to its most popular services (email, navigation) lesser-known alternatives, such as Telnet.

Before the www make possible the “navigation chart” Internet-connected computers only understand “script” to a DOS or UNIX. Telnet was and is one of the ways to connect to another computer and run it these commands. In fact predates Telnet internet is used computer-computer, i.e., direct call through the computer terminal to the host computer, while normal today is run across the internet, by the common protocol IP /TCP.

The advent of graphical navigation Telnet has relegated most restricted uses, usually associated with remote management of equipment or highly specialized consulting resources (libraries, BBS, Archie, databases). However, there are interesting resources which can only be accessed by Telnet. Read the rest of this entry »

L2L connections

Land to land (site to site) connections are best suited for routers since it can do multiple dynamic site VNP

• WAN extension of a classical design
• Configurations Steps
• Handle design and Policy
• Verify connectivity without IPSec (ping)
• Create extended ACL to allow IPSec traffic into the router
• Configure ISAKMP / IKE Phase 1 Policies
• Create extended ACL That Defines Which is traffic to be protected for the tunnel
• Create transform sets
• Create a crypto map That binds together the peer’s information protection
• Activate on the crypto map interface
• Test IPSec tunnel

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You may have read in some sites specialized in securities of the subject, Cisco CCNP certification will appear in a few months in the version 6 with fresh content and to solve new problems to which networks professionals about now face .
Specifically, the composite examination will be divided into three blocks and available from the month of July 2010:

• Implementing Cisco IP Routing (ROUTE 642-902) which replaces the current BSCI (Building Scalable Cisco Internetworks)
• Implementing Cisco IP Switched Networks (SWITCH 642-813) which replaces the current BCMSN (Building Cisco Multilayer Switching Networks)
• Troubleshooting (TShoot 642-832), which normally replace the current reviews ISCW and ONT.

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