Why would a network administrator configure port security on a switch?（）

A . to control vty access into a router   B . to control broadcast traffic through a router   C . to filter traffic as it passes through a router   D . to filter traffic that originates from the router   E . to replace passwords as a line of defense against security incursions&e

A . xSeries specialist，as the customer may have some Intel-based systems. B . Hardware customer engineer，as they will be installing the entire solution. C . Services specialist，as they can provide education recommendations for the entire solution.  D . Storage specialist，as the customer may need disk to store the data and tape to backup the data.

A .  Type 1 B .  Type 2 C .  FXS D .  FXO E .  E&M

A . show ospf B . show ip route C . show ip protocols D . show ip ospf database E . None of the other alternatives apply

A . to confine network instability to single areas of the network. B . to reduce the complexity of router configuration. C . to speed up convergence. D . to lower costs by replacing routers with distribution layer switches. E . to decrease latency by increasing bandwidth. F . to reduce routing overhead.

A . in order to optimize the path that frames take from source to destination B . to increase the priority so a designated port will become a root port C . to increase the BID, so the switch is more likely to become root bridge D . in order to allow VLANs to be sent from one switch to another across a single link E . to force a given switch to become an STP server

A .  Cisco SLM series B .  Cisco SD series C .  Cisco SFE series D .  Cisco SGE serie

A . to verify the type of cable interconnecting two devices B . to determine the status of network services on a remote device C . to obtain VLAN information from directly connected switches D . to verify Layer 2 connectivity between two devices when Layer 3 fails E . to obtain the IP address of a connected device in order to telnet to the device F . to determine the status of the routing protocols between directly connected router

A .  To provide message level security B .  To allow integration with Web 2.0 applications C .  To be able to use XML to format response messages D .  To be able to use the HTTP or HTTPS transport protocol

A . An update packet with init flag set from a known， already established neighbor relationship was received by one of the routers. B . The counters were deleted. C . The ARP cache was removed. D . The IP EIGRP neighbor relationship was cleared manually.

A . to control vty access into a router B . to control broadcast traffic through a router C . to filter traffic as it passes through a router D . to filter traffic that originates from the router E . to replace passwords as a line of defense against security incursio

A . to prevent unauthorized Telnet access to a switch port B . to limit the number of Layer 2 broadcasts on a particular switch port C . to prevent unauthorized hosts from accessing the LAN D . to protect the IP and MAC address of the switch and associated ports E . to block unauthorized access to the switch management interfaces over common TCP port

A . GRE can use transport mode and save up to twenty bytes per packet. B . The corporate network includes many discontinuous blocks of IP networks and requires split tunneling. C . The corporation's primary application is based on IP multicast. D . Without GRE, there is no means to detect a head-end failure. E . GRE would enable path MTU discovery.

A . show ip ospf B . show ip route C . show ip protocols D . show ip ospf database E . None of the other alternatives apply

A . IPSec VPN B . SSL VPN C . port security D . port security with statically configured MAC addresses E . private VLAN

A . to confine network instability to single areas of the network. B . to reduce the complexity of router configuration C . to speed up convergence D . to lower costs by replacing routers with distribution layer switches E . to decrease latency by increasing bandwidth F . to reduce routing overhead

A . Because data does not need to arrive intact, so data transfer rates can be variable B . Because lost voice-data packets must be retransmitted C . Because voice data packets should arrive quickly and sequentially, and with no lost data D . Because voice data packets must follow a single dedicated path through the network

A .  computerization of order entry for physicians B .  compliance with HIPPA requirements C .  improved bandwidth D .  greater fault tolerance

A . 15.234.118.63 B . 83.121.178.93 C . 134.178.18.56 D . 192.168.19.37 E . 201.45.116.159 F . 217.63.12.192

A . To use ftp and telnet B . To perform NFS mounts C . To make /etc/hosts files unnecessary D . To reduce network traffic and save bandwidth

A . to verify the type of cable interconnecting two devices B . to determine the status of network services on a remote device C . to obtain VLAN information from directly connected switches D . to verify Layer 2 connectivity between two devices when Layer 3 fails E . to obtain the IP address of a connected device in order to telnet to the device F . to determine the status of the routing protocols between directly connected router

A . to verify the type of cable interconnecting two devices B . to determine the status of network services on a remote device C . to obtain VLAN information from directly connected switches D . to verify Layer 2 connectivity between two devices when Layer 3 fails E . to obtain the IP address of a connected device in order to telnet to the device F . to determine the status of the routing protocols between directly connected router

A．Because it was melting, B．Because it was good and cheap. C．Because it was fresh and hard. D．Because it was of premium quality.