A periodic composite signal with a bandwidth of 3000 Hz,is composed of two sine waves. First one has a frequency of 100 Hz with a maximum amplitude of 30 V, the second one has a maximum amplitude of 10 V. Draw the bandwidth.

We measure the performance of a telephone line (4 KHz of bandwidth). When the signal is 20 V, the noise is 6 mV. What is the maximum data rate supported by this telephone line?

How much is the signal amplified? and what is the total gain? when a signal is passed through three cascaded amplifiers, each with a 5 dB gain.

A device is sending out data at the rate of 2000 bps. How long does it take to send out 100 bits? How long does it take to send out a singal character (8 bits)? How long does it take to send a file of 100,000 characters?

Data Com,

If the bandwidth of the channel is 8 Kbps, How long does it take to send a frame of 200,000 bits out of this device?

Kuwait University, University,

A signal with 300 milliwatts power passes through 10 devices, each with an average noise of 3 microwatts. What is the SNR? What is the SNRdb?

A computer monitor has a resolution of 1300 by 1000 pixels. If each pixel uses 1024 colors, how many bits are needed to send the complete contents of a screen?

which layer of osi model ensures reliable trasnmission of data

I am using windows server 2008 and its working as DHCP server. 100 clients are connected to this server. All clients are accessing Internet. But I wanna to block some specific websites which is not required by client. So how it can be done through DHCP server? is there any third party software available ? or any other method you know then please answer it.

1.Explain the main purpose of IP address? 2.List two purposes for a web browser? 3.Explain an advantage and a disadvantage of multiple search engines? 4.Describe two roles of Internet Services Providers (ISPs)?

IBM,

what is difference safe mode normal mode

TATA, Wipro,

• Brief me about yourself? • What are your day to day job roles /responsibilities? • What is the through put of 3560 POE switch? • What is POE switch? • How will you configure VLAN in a new switch? • What is NAT? • Different types of NAT? • Difference between NAT & PAT? • Explain with diagram how you can access a PC on internet; will NAT come into picture, how? • How many physical ports are there in PIX 515E? Are they Ethernet of gigabyte? • What is difference between ASA5510 & ASA5550?How many ports are there • Explain any client network topology? • How will you configure a new firewall, parameters for configuration? • What is HSRP? • If a link is down what status will be the interface be in? • How good are you in SWITCHING ,rate yourself between 1 to 5 • What is VLAN • Avaya IP Phone, separate required? • Configuration for DATA and VOICE VLAN? • What is VTP? • Modes of VTP • Can we have more than 2 VTP servers in a single VTP domain? • What is STP? • How STP works? • How is Root Bridge elected? • Which priority is considered, highest or lowest? • Difference between STP & RSTP? • Modes of STP? • By default which mode of STP is there? • By default which mode of VTP is there? • In firewall which security level is what? • What is DMZ? • What is ether channel?

DELL, TCS,

pls. tell all the commands for configure cisco router 1900 series.

Unable to connect to local DB

how can i install active directory in windows 2008

HCL, IntelNet,