Cisco

I would suggest to start with CCIE R&S. This will provide you a rock-solid foundation for any of your future endeavors. After the R&S I think you need to study the market and see where the Cisco products are being used mostly. It doesn't make sense to do CCIE in Data Storage when Cisco has only a niche market share. I would suggest think about doing Wireless (WiFi is the future, period.) If you want fancy stuff, and plan to move into consumer market, then go for Voice or Security. Either way, go for R&S first, and then for any other track. Plus, Double-CCIE sounds manly and macho ;)

When a client wishes to send a UDP datagram there is nothing that they are required to except to send it. The datagram will use a checksum to verify the integrity of the datagram and deliver it where it needs to go.

OSPF uses cost as its routing metric .

cost is calculated for every outgoing interface of a router through which packets transfer.

it is calculated by the formula

cost = 100000000/(bandwidth of output interface)

most likely bandwidth of serial int is 1544kb= 1544000 bytes

PS: all cost calculation to be done in bytes for ease

The "s" at the end represents a secure sever connection. They're usually utilized when making an online purchase, or logging into an account with sensitive information (i.e. online banking, loan repayment websites, etc)/

for establishing connection between the end systems

here we have 3 steps

sender receiver

sync bit ==1

1................................................>>>>

reply to sync bit + sync bit of receiver

2. <<<< .................................................

replay to R sync bit

3. ....................................................>>>>>

whole process is in three steps so we call it as three way handshake

cross-connect facility

June 5th, 1999

one number of host bits must be left when you doing subnetting.

sun and rocks

The debug ip rip command displays RIP routing activity in real time.

The debug ip rip command can be issued at the user EXEC configuration mode.

data link

Jh

This command will copy the running configuration (located in RAM) of a Cisco device to a TFTP server. After executing the command you will be prompted for further information about the TFTP server (Server Address, file name, etc.).

Orw-or,grw-blu,bluw-gr,brw-br

Quality of Service (QoS) is primarily applied to Internet telephony (IP telephony, VoIP).

In VoIP (Voice over Internet Protocol) telephony the cable frequently shared with internet connection.

If internet connection uses/occupies too much of cable's transmission capability by downloading or uploading files, there will be not enough cables resources to transmit telephony signal effectively thus making conversation impossible or with low hearing rate.

QoS reserves certain amount of cable's capability only for telephony, thus no matter how much internet connection is used, there is always enough room for plenty of simultaneous telephone conversations.

The Cisco Unity service is a service that providers information, technology and collaboration details and software for people looking to branch out to other companies.

there may be the issue with the layer 2 protocol like hdlc or ppp is not configured or wrongly configured if the interface is serial interface.

Cisco Secure ACS provides companies with protection against potential threats and security breaches. It categorizes and recognizes threats from both within and without the company and greatly reduces the amount of work and worrying required of your company.

Found in many different places, the price of a Cisco 2651XM router can vary considerably also. A brand new router on Amazon can cost around 300, though if you want a cheaper version, a used version will cost you much less.

Complex address schemes