77501. A capacitor is connected across a 200 V AC line.Its minimum voltage rating should be:
77502. The power factor of 3-phase load is less than While measuring power by two watt meters:
77503. Voltage required to operate the Neon sign tubes depends upon:
77504. Soldering of a Britania Joint is a necessity to avoid loosening of the joint due to:
77505. What are the decimal and hexadecimal equivalents for the binary number 10110111?
77506. What is the purpose of flow control?
77507. Which three statements are true about the operation of a full-duplex Ethernet network? There are no collisions in full-duplex mode. A dedicated switch port is required for each full-duplex node. Ethernet hub ports are preconfigured for full-duplex mode. In a full-duplex environment, the host network card must check for the availability of the network media before transmitting. The host network card and the switch port must be capable of operating in full-duplex mode.
77508. Which of the following are types of flow control? Buffering Cut-through Windowing Congestion avoidance
77509. What are two purposes for segmentation with a bridge? To add more broadcast domains. To create more collision domains. To add more bandwidth for users. To allow more broadcasts for users.
77510. How does a host on an Ethernet LAN know when to transmit after a collision has occurred? In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously. In a CSMA/CD collision domain, stations must wait until the media is not in use before transmitting. You can improve the CSMA/CD network by adding more hubs. After a collision, the station that detected the collision has first priority to resend the lost data. After a collision, all stations run a random backoff algorithm. When the backoff delay period has expired, all stations have equal priority to transmit data.
77511. Which of the following types of connections can use full duplex? Hub to hub Switch to switch Host to host Switch to hub Switch to host
77512. Acknowledgments, sequencing, and flow control are characteristics of which OSI layer?
77513. Which fields are contained within an IEEE Ethernet frame header? Source and destination MAC address Source and destination network address Source and destination MAC address and source and destination network address FCS field
77514. What type of RJ45 UTP cable do you use to connect a PC's COM port to a router or switch console port?
77515. How to implement a network medium that is not susceptible to EMI. Which type of cabling should you use?
77516. Segmentation of a data stream happens at which layer of the OSI model?
77517. When data is encapsulated, which is the correct order?
77518. Which of the following are unique characteristics of half-duplex Ethernet when compared to full-duplex Ethernet? Half-duplex Ethernet operates in a shared collision domain. Half-duplex Ethernet operates in a private collision domain. Half-duplex Ethernet has higher effective throughput. Half-duplex Ethernet has lower effective throughput.
77519. What type of RJ45 UTP cable is used between switches?
77520. Which layer 1 devices can be used to enlarge the area covered by a single LAN segment? Switch NIC Hub Repeater RJ45 transceiver
77521. Routers operate at layer _____. LAN switches operate at layer _____. Ethernet hubs operate at layer _____. Word processing operates at layer _____.
77522. Which of the following describe router functions?
77523. Why does the data communication industry use the layered OSI reference model? It divides the network communication process into smaller and simpler components, thus aiding component development, design, and troubleshooting. It enables equipment from different vendors to use the same electronic components, thus saving research and development funds. It supports the evolution of multiple competing standards and thus provides business opportunities for equipment manufacturers. It encourages industry standardization by defining what functions occur at each layer of the model.
77524. A receiving host has failed to receive all of the segments that it should acknowledge. What can the host do to improve the reliability of this communication session?
77525. The testing of wiring installation for insulation resistance to ensure that:
77526. Braking torque in energy meter is produced to:
77527. The scale of dynamometer type wattmeter is of:
77528. The standard secondary voltage for PT used in power system in:
77529. Which instrument always indicates true r.m.s.value irrespective of the waveform?
77530. Which of the following commands displays the configurable parameters and statistics of all interfaces on a router?
77531. Which of the following commands will configure all the default VTY ports on a router?
77532. You need to find the broadcast address used on a LAN on your router. What command will you type into the router from user mode to find the broadcast address?
77533. Which command will delete the contents of NVRAM on a router?
77534. What keystroke will terminate setup mode?
77535. What command do you type to save the configuration stored in RAM to NVRAM?
77536. You type Router#sh ru and receive an % ambiguous command error. Why did you receive this message?
77537. If you wanted administrators to see a message when logging into the router, which command would you use?
77538. How many simultaneous Telnet sessions does a Cisco router support by default?
77539. You set the console password, but when you display the configuration, the password doesn't show up; it looks like this: [output cut] Line console 0 Exec-timeout 1 44 Password 7098C0BQR Login [output cut] What cause the password to be stored like this?
77540. Which command will show you whether a DTE or a DCE cable is plugged into serial 0?
77541. You want to totally reinitialize the router and replace the current running-config with the current startup-config. What command will you use?
77542. If you delete the contents of NVRAM and reboot the router, what mode will you be in?
77543. What is the problem with an interface if you type show interface serial 0 and receive the following message? "Serial0 is administratively down, line protocol is down."
77544. Which of the following commands sets the secret password to Cisco?
77545. You type the following command into the router and receive the following output: Router#show serial 0/0 ^ % Invalid input detected at '^' marker. Why was this error message displayed?
77546. Which of the following commands will display the current IP addressing and the layer 1 and 2 status of an interface? show version show protocols show interfaces show controllers show ip interface
77547. You type show running-config and get this output: [output cut] Line console 0 Exec-timeout 1 35 Password BIXPASSWD Login [output cut] What do the two numbers following the exec-timeout command mean?
77548. What layer of the OSI model would you assume the problem is in if you type show interface serial 1 and receive the following message? "Serial1 is down, line protocol is down."
77549. A voltmeter gives inaccurate reading to measure the drop across a low resistance because:
77550. The phase difference between the currents in the two pressure coils in PF meter is: