77702. One of the diode of a bridge rectifier connected to 100 V 50Hz AC input is found to be damageThe DC output of the circuit is 90V.The minimum value of PIV of the diode required for replacement is:
77703. You are working with a fully automatic star delta starter.You notice that when start switch is pressed the motor starts in star but does not change to deltThe trouble will be in:
77704. Watt-hour meter is classified as a:
77705. Two pin sockets should not be used in domestic wiring unless the appliance to be connected is:
77706. As load on induction motor increases its power factor:
77707. You have two switches connected together with two crossover cables for redundancy, and STP is disabled. Which of the following will happen between the switches?
77708. Layer 2 switching provides which of the following? Hardware-based bridging (ASIC) Wire speed Low latency Low cost
77709. Your switch has a port status LED that is alternating between green and amber. What could this indicate?
77710. You want to run the new 802.1w on your switches. Which of the following would enable this protocol?
77711. Which of the following is a layer 2 protocol used to maintain a loop-free network?
77712. You need to allow one host to be permitted to attach dynamically to each switch interface. Which two commands must you configure on your catalyst switch to meet this policy? Switch(config-if)# ip access-group 10 Switch(config-if)# switchport port-security maximum 1 Switch(config)# access-list 10 permit ip host 1 Switch(config-if)# switchport port-security violation shutdown Switch(config)# mac-address-table secure
77713. What command will display the forward/filter table?
77714. If a switch receives a frame and the source MAC address is not in the MAC address table but the destination address is, what will the switch do with the frame?
77715. What is the result of segmenting a network with a bridge (switch)? It increases the number of collision domains. It decreases the number of collision domains. It increases the number of broadcast domains. It decreases the number of broadcast domains. It makes smaller collision domains. It makes larger collision domains.
77716. What are the distinct functions of layer 2 switching that increase available bandwidth on the network? Address learning Routing Forwarding and filtering Creating network loops Loop avoidance IP addressing
77717. What is the purpose of Spanning Tree Protocol in a switched LAN?
77718. Which statement describes a spanning-tree network that has converged?
77719. What does a switch do when a frame is received on an interface and the destination hardware address is unknown or not in the filter table?
77720. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in a switched LAN?
77721. If you want to disable STP on a port connected to a server, which command would you use?
77722. During no load test of a 3 phase induction motor,the motor draws power:
77723. The recent method of smooth speed control of a three-phase induction motor over a wide range is:
77724. Rotor bars of squirrel cage rotor are sometimes skewed:
77725. For 66 kV lines the number of insulator discs used is:
77726. AC resistance of a line conductor is more than its DC resitance because of:
77727. You have a network that needs 29 subnets while maximizing the number of host addresses available on each subnet. How many bits must you borrow from the host field to provide the correct subnet mask?
77728. If an Ethernet port on a router were assigned an IP address of 172.16.112.1/25, what would be the valid subnet address of this host?
77729. You have an interface on a router with the IP address of 192.168.192.10/29. Including the router interface, how many hosts can have IP addresses on the LAN attached to the router interface?
77730. What is the subnetwork number of a host with an IP address of 172.16.66.0/21?
77731. The network address of 172.16.0.0/19 provides how many subnets and hosts?
77732. You need to configure a server that is on the subnet 192.168.19.24/29. The router has the first available host address. Which of the following should you assign to the server?
77733. You have an interface on a router with the IP address of 192.168.192.10/29. What is the broadcast address the hosts will use on this LAN?
77734. You have a network with a subnet of 172.16.17.0/22. Which is the valid host address?
77735. On a VLSM network, which mask should you use on point-to-point WAN links in order to reduce the waste of IP addresses?
77736. To test the IP stack on your local host, which IP address would you ping?
77737. If a host on a network has the address 172.16.45.14/30, what is the subnetwork this host belongs to?
77738. Using the following illustration, what would be the IP address of E0 if you were using the eighth subnet? The network ID is 192.168.10.0/28 and you need to use the last available IP address in the range. The zero subnet should not be considered valid for this question.
77739. Which configuration command must be in effect to allow the use of 8 subnets if the Class C subnet mask is 255.255.255.224?
77740. Using the illustration from the previous question, what would be the IP address of S0 if you were using the first subnet? The network ID is 192.168.10.0/28 and you need to use the last available IP address in the range. Again, the zero subnet should not be considered valid for this question.
77741. What is the subnetwork address for a host with the IP address 188.8.131.52/28?
77742. Your router has the following IP address on Ethernet0: 172.16.2.1/23. Which of the following can be valid host IDs on the LAN interface attached to the router? 172.16.1.100 172.16.1.198 172.16.2.255 172.16.3.0
77743. Which two statements describe the IP address 10.16.3.65/23? The subnet address is 10.16.3.0 255.255.254.0. The lowest host address in the subnet is 10.16.2.1 255.255.254.0. The last valid host address in the subnet is 10.16.2.254 255.255.254.0. The broadcast address of the subnet is 10.16.3.255 255.255.254.0.
77744. A network administrator is connecting hosts A and B directly through their Ethernet interfaces, as shown in the illustration. Ping attempts between the hosts are unsuccessful. What can be done to provide connectivity between the hosts?
A crossover cable should be used in place of the straight-through cable. A rollover cable should be used in place of the straight-through cable. The subnet masks should be set to 255.255.255.192. A default gateway needs to be set on each host. The subnet masks should be set to 255.255.255.0.
77745. What is the maximum number of IP addresses that can be assigned to hosts on a local subnet that uses the 255.255.255.224 subnet mask?
77746. You need to subnet a network that has 5 subnets, each with at least 16 hosts. Which classful subnet mask would you use?
77747. What type of insulator will be used if the direction of the transmission line is changed?
77748. The back emf set up in the armature of a synchronous motor depends on:
77749. The current drawn by an over excited synchronous motor will be:
77750. Two alternators are sharing an inductive load equally.What will be happened if the excitation of one alternator is increased?