My Netwok Dictionary

Since the topic is interesting and are being implemented, let us clarify a small lab for a bit to the question:

The “cloud” C4 is connected the iMac ethernet which in turn connects a laptop used for testing.

The IP configuration of both routers:

R3 # sh ip interested briefs
Interface IP-Address OK? Method Status Protocol
FastEthernet0 / 0 10.2.0.2 YES manual up up
Loopback1 10.3.0.1 YES manual up up
Tunnel0 10.50.0.2 YES manual up up

R4 # sh ip interested briefs
Interface IP-Address OK? Method Status Protocol
FastEthernet0 / 0 10.1.0.220 YES manual up up
FastEthernet1 / 0 10.2.0.1 YES manual up up
Tunnel0 10.50.0.1 YES manual up up Read the rest of this entry »

IP Address

IP is one of 32-bit binary number that identifies precisely and only the location of each computer on the Internet. The binary numbers of the IP address in decimal numbers expressed in four parts, each of which represents 8 bits of the 32 total.

During your internet connection, your ISP assigns you an IP number. No matter the type of computer you own or what kind of connection you have, if you’re on the Internet, means that the network protocol you use TCP / IP, and connecting your computer has, at that time, a unique IP number. Read the rest of this entry »

The subnetting with VLSM (Variable Length Subnet Mask), is one of the methods that are implemented to prevent IPv4 address exhaustion and will allow better utilization and optimization of the use of addresses.

The three concepts of VLSM, CIDR and route summarization are complementary and confusing.

VLSM: It is the result of the process by which a network or subnet divided into smaller subnets whose masks are different according to adapt to the needs of hosts per subnetwork.

CIDR (Classless Inter-domain Routing): The CIDR is the ability of routing protocols send updates to neighboring networks with VLSM and summarize the directions in one direction.

Route Summarization: Also called route summary, supernetting or superlattices, is the process carried out by a router through a routing protocol which set the basis of network address (CIDR block) gives a common direction containing the other to be sent in their updates. Read the rest of this entry »

The practices are nothing more than a culture and education that we acquire in order to avoid future problems in use of equipment and systems. Today is so common that we use computers, ATMs, communications technologies, networks and Internet , that we realize that all the information we manage our own information, emails, information through chat , data bank files of interest and all of our daily work is precisely handled by computers and equipment are vulnerable and in a blink of an eye can suffer from an attack, alterations, or breakdowns.

Security on a computer, node or computer: One of the first items to be covered are the access codes, keys should not be used in its constitution are very common, as is the case with the initials of the name and the date of birth, aliases or nicknames that everyone knows, or incorporated only letters or only numbers, these types of keys are on the intruders, hackers and thieves looking for first-hand to do combinations of uppercase and lowercase letters and numbers turn. We must not share the keys, is common when someone else needs to use our equipment, computers and systems give them the keys and often use up loud, in front of many people who are not part of the company. Read the rest of this entry »

In this tutorial the commands to retrieve the password (password recovery) of Cisco routers for the following models are discussed:

Cisco 1000 Series Router
Cisco 1600 Series Router
Cisco 1700 Series Router
Cisco 1800 Series Router
Cisco 2600 Series Router
Cisco 2800 Series Router
Cisco 3600 Series Router
Cisco 3700 Series Router
Cisco 4500 Series Router
Cisco 7200 Series Router
Cisco 7500 Series Router
Cisco 7200 Series Router
Cisco 12000 Series Router
AS5200 Series
AS5300 Series Read the rest of this entry »