Associate consulting engineer Interview Questions

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Cisco Systems
Associate Network Consulting Engineer was asked...April 21, 2011

Explain the difference between TCP and UDP

4 Answers

That's really as difficult as it gets?

UDP packet processing is faster compared to TCP packet processing. This is because once TCP packets are delivered to the destination, an acknowledgement is expected at the transmission end. If no acknowledgement is received, re-transmission of packets occurs at the transmission end. This is opposite to UDP operation, in which no acknowledgement is necessary. Less

TCP is a reliable protocol that utilizes windowing and acknowledgement packets to ensure all traffic is transmitted and received UDP is an unreliable protocol that does not utilize windowing and acknowledgements, and is good to use when you can't re-transmit a packet (EG a voice or video packet) Less

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CDW

What is the difference between hubs, switches, and routers?

3 Answers

Hubs function at Layer 1 of the OSI model, and extend a single LAN segment in a single collision domain. Switches function at Layer 2, and divide a LAN into several collision domains. Routers function at Layer 3, stop broadcasts, and forward IP traffic between networks. Less

What is a hub? A common connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. What is a switch? A network switch (also called switching hub, bridging hub, officially MAC bridge) is a computer networking device that connects devices together on a computer network. What is a router? A router is a device that forwards data packets along networks. A router is connected to at least two networks, commonly two LANs or WANs or a LAN and its ISP's network. Less

I gave details about the differences in the hardware.

CDW

Explain what QoS is?

2 Answers

Quality of service

The overall performance of a telephony or computer network, particularly the performance seen by the users of the network. Less

Cisco Systems

Talk about what IoT is

2 Answers

Talked about IoT and the Cisco IoT products I used

Thank you for your great feed-back! Hope I’ll be contacted for the third step of the interview.. can I ask you how you prepared yourself for the more technical rounds? Do you have any suggestions on some material to review before the interview? Less

CDW

Why I was seeking a job in the IT field.

1 Answers

It is my passion.

CDW

What is a routing protocol? What is a routed protocol?

1 Answers

I had a CCNA background, but wasn't able to answer this because my brain just stopped working. Less

CDW

The phone interview went ok for the most part.. Typical interview questions. The only question that caught me off guard was "In your spare time, how do you stay current with today's changing technologies?"

1 Answers

LOL, I explained that in my current position selling IT equipment for a asset management company, I'm constantly researching equipment that comes in so that I can test and resell it with some knowledge. And in my spare time I play golf and that I'm also a semi-pro musician in a very busy wedding/cover band. (I tried to put it out there that I'm ok in front of people!) Less

CDW

I received the same questions as everyone else has reported.

1 Answers

If you don't know the answer say so. be humble. Say you don't know for sure, but ask if you can try to answer anyway. Less

CDW

Several questions about presentation experience in my former role.

1 Answers

I had no presentation experience in a professional environment. I answered honestly and did not try to exaggerate any of my answers. I gave simple examples when I could, otherwise I just explained that my previous role did not require me to give presentations. Less

Cisco Systems

How does Google make money?

1 Answers

Advertising and financial operations (youtube etc.)

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