Routing Switch

Routing Switch

ROUTE, TSHOOT, SWITCH exams CCNP and CCDP by Cisco

CISCO ANNOUNCED REPLACEMENT EXAMS ROUTE, TSHOOT, and SWITCH:

Cisco has updated its CCNP and CCDP certifications by launching the latest ROUTE exam 642-902, TSHOOT exam 642-832, and SWITCH exam 642-813 on July 31, 2010. These updates are evidence of current knowledge of latest technology.

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Self Exam Engine provides you with the best possible preparation by developing the real questions answers necessary to pass these exams in first go. Your success in first attempt is our objective, and your trust in us is our success.

Experience of networks and IT is at the top mostly, and all those who are experienced, and want to enhance their profile in IT and networks, must go through the practice testing software and revise their knowledge on questions answers which are real questions covering all the requirements to pass new cisco exams very easily.

We at selfexamengine are putting our best efforts to contribute in passing these exams with 100% guarantee. So, in order to gain expertise in Cisco Routing, Troubleshooting, and Implementing Cisco IP Switched Networks, insure your exam attempt today.

ROUTE EXAM: Implementing Cisco IP Routing (ROUTE)

TSHOOT EXAM: Troubleshooting and Maintaining Cisco IP Networks

SWITCH EXAM: Implementing Cisco IP Switched Networks (SWITCH)

These Latest Exams by Cisco associated with CCNP, CCDP and CCIP certifications.

Self Exam Engine makes you perfect to pass exams 642-902, 642-832, and 642-813.

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Basic functional difference between a hub and a switch is?

a. Hub does signal repeating but switch doesn’t
b. Switch does the IP routing and Hub does not
c. Hub is used to connect similar type of networks switch can be use to interconnect dissimilar networks
d. Hub is used to divide the network in to segments and switch is used to extend the network connectivity
e. Hub works on layer one and switch works on layer two or above

First of all: Ethernet's logical topology is a bus: a single cable carries all data in all directions, which reach all equipments connected to it. Just think about a network using 10Base2 or 10Base5 (coaxial cable) and you'll quickly understand this point.

Now suppose you collapse all the bus (the cable that reaches all computers) in a little box and then connect this little box to each computer using another cable. This box is basically a hub, a level 1 device in the OSI model. Note that the physical topology of the network has become a star (all cables go to a central point), but logically, it's still a bus (this last part is important, because Ethernet is always a bus).

More specifically, a hub processes data bit by bit. Whenever a bit arrives through a port, it's automatically replicated to all others. Aside replication, it also regenerates and amplifies the transmitted signal. But keep in mind that it doesn't process any of the data that travels through it (it's a level 1 device).

On the other hand, a switch is more complex. It's quite similar to a hub in its physical functionality, though a switch isolates connections between hosts: frames sent through a port are only replicated to the port that contains the target computer, not all ports. To do this, the switch stores the received frame into memory, gets its target MAC address, finds a match in its MAC-to-port translation table and transmits the frame to that port. Therefore, this is a level 2 device.

Because the switch handles level 2 frames (not raw bits), it can do much more than just replicate data. For example, it can avoid the replication of collisions and errors: the former is always present, but the later is only found in store and forward switches (not cut-through).

However, a good (and very expensive) switch can do much more than this; it can apply security policies to ports, replicate configurations to other switches, manage virtual LANs, etc.

GNS3, CCIE Routing and Switching Part 1, Lamine Ba Montreal