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Cisco
Cisco Systems, Inc. is a major IT company, which produces networking equipment and network management solutions for both personal and commercial use. Questions about this company and its products belong here.
1,095 Questions
Where can i find cisco certification classes online?
You can find classes through the Cisco website. You can also find classes at a local close to you. Access it here; http://www.cisco.com/web/learning/index.html
Are devices in a single collision domain in the same broadcast domain?
Which process best describes selective forwarding in a switch?
forwarding packets to the port that is connected to the destination node
there are 2 available protocols used to encapsulate data traffic over a trunk link on a cisco switch
1. 802.1q is proprietary works only between 2 cisco switches
2. ISL is open standard works with any switch..
What is a cisco 877w used for?
A Cisco 877w is a wireless router used to secure concurrent services at broadband speeds to offices. The router is usually used in small offices or units such as telemarketers use.
What protocol secured file transfer system and default port?
The Secure File Transport Protocol (SFTP, also known as SSH or Secure Shell) typically is run on port 22.
What is the syntax to add a banner to a Cisco router configuration?
Router#banner motd @ MESSAGE @
Like this the syntax should u must start and end with a unique character (any)
What is the different type of route summarization available in OSPF?
There are two types of summarization:
Inter-area route summarization
External route summarization
i) Inter-Area Route Summarization
Inter-area route summarization is done on ABRs and it applies to routes from within the AS. It does not apply to external routes injected into OSPF via redistribution. In
order to take advantage of summarization, network numbers in areas should be assigned in a contiguous way to be able to lump these addresses into one range. To
specify an address range, perform the following task in router configuration mode:
area area-id range address mask
Where the "area-id" is the area containing networks to be summarized. The "address" and "mask" will specify the range of addresses to be summarized in one range.
The following is an example of summarization:
External route summarization
i) External route summarization is specific to external routes that are injected into OSPF via redistribution. Also, make sure that external ranges that are being
summarized are contiguous. Summarization overlapping ranges from two different routers could cause packets to be sent to the wrong destination. Summarization is
done via the following router ospf subcommand:
She can use the command:ip dhcp snooping binding
Cisco Connect is the Windows/MacOS application that is used to configure and manage the Cisco Home Networking (Linksys and Valet) products.
What security measures does the Cisco 2621 provide?
The Cisco 2621 has a number of security features. It is equipped with a secure firewall to prevent against viruses and threats. It is encrypted to prevent hacking.
What training courses does Cisco offer for their employees?
Cisco offers training course on all of its products, both hardware and software. You could become very adept at computer networking from using the employee Cisco courses.
What is a local digital loop back?
A local digital loopback is a test that is performed to check the transmitter and receiver of a local modem, or being simpler, it's a test that sends a signal to a remote receiver and waits for the signal to be returned.
At Which Prompt would you configure the Hostname on a Cisco Router?
You can do this on the enable, or privileged, prompt.
Why computers are used in schools?
Computers are useful in schools because they provide a whole new way of learning. It provides easy research and also interactive learning sources, such as bbc. It is also practical as it means that you can save items easily and you can save paper and it is useful for those of us who have poor handwriting. I know that I like having computers at my school because they allow for independence and give us a break from listening to teachers non-stop.
Which three actions are performed during the boot sequence of a Cisco switch Choose three?
The boot loader performs POST.
The boot loader is loaded from RAM.
The boot loader initializes the flash file system that is used to boot the system
Can you use a Cisco 7921 phone with Skype?
Skype uses their own non-standard protocol, so no, you can't use Cisco or other SIP phones with it.
Where can you find the Cisco 7206 installation and configuration guide?
You can find the installation and configuration guide for a Cisco 7206 on the official Cisco website specifically in the documents for routers section.
Where is the best place to purchase a Cisco 7960?
One can purchase a Cisco 7960 in many places, but the most reliable places would be in trustworthy sites online like Amazon, Best Buy, Ebay, Sears, or the Cisco home site.
What are physical communication media?
# Twisted pair - Wire twisted to avoid crosstalk interference. It may be shielded or unshielded. #* UTP-Unshielded Twisted Pair. Normally UTP contains 8 wires or 4 pair. 100 meter maximum length. 4-100 Mbps speed. #* STP-Shielded twisted pair. 100 meter maximum length. 16-155 Mbps speed. Lower electrical interference than UTP. # Coaxial - Two conductors separated by insulation such as TV 75 ohm cable. Maximum length of 185 to 500 meters. ## Thinnet - Thinnet uses a British Naval Connector (BNC) on each end. Thinnet is part of the RG-58 family of cable*. Maximum cable length is 185 meters. Transmission speed is 10Mbps. Thinnet cable should have 50 ohms impedance and its terminator has 50 ohms impedance. A T or barrel connector will have no impedance. Maximum thinnet nodes are 30 on a segment. One end of each cable is grounded. ## Thicknet - Half inch rigid cable. Maximum cable length is 500 meters. Transmission speed is 10Mbps. Expensive and is not commonly used. (RG-11 or RG-8). A vampire tap or piercing tap is used with a transceiver attached to connect computers to the cable. 100 connections may be made. The computer has an attachment unit interface (AUI) on its network card which is a 15 pin DB-15 connector. The computer is connected to the transceiver at the cable from its AUI on its network card using a drop cable. Maximum thicknet nodes are 100 on a segment. One end of each cable is grounded. 3. Fiber-optic - Data is transmitted using light rather than electrons. Usually there are two fibers, one for each direction. Cable length of 2 Kilometers. Speed from 100Mbps to 2Gbps. This is the most expensive and most difficult to install, but is not subject to interference. Two types of cables are: 1. Single mode cables for use with lasers has greater bandwidth and costs more. Injection laser diodes (ILD) work with single mode cable. 2. Multimode cables for use with Light Emitting Diode (LED) drivers. All signals appear to arrive at the same time. P intrinsic N diodes or photodiodes are used to convert light to electric signals when using multimode.
{| ! Media ! Distance(meters) ! Speed ! Approx Cost/station | UTP 100 4-100Mbps $90 STP 100 16-155Mbps $125 Thinnet 185 10Mbps $25 Thicknet 500 10Mbps $50 Fiber 2000 100Mbps-2Gbps $250 (multimode) |}
A process or mechanism responsible for the development or motion of a system.
Continuous activity, change, progress (vigor).
Philosophical or theories systems that explain the universe in terms of energy or force.
It is abit like Universal Dynamism which is an art term used to describe moving objects or shapes.
