An administrator is unsuccessful in adding VLAN 50 to a switch. While troubleshooting the problem，the administrator views the output of the show vtp status command， which is displayed in the graphic. What commands must be issued on this switch to add VLAN 50 to the database？（）
A. Switch（config-if）# switchport access vlan 50
B. Switch（vlan）# vtp server
C. Switch（config）# config-revision 20
D. Switch（config）# vlan 50 name Tech
E. Switch（vlan）# vlan 50
F. Switch（vlan）# switchport trunk vlan 50
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A.10.188.31.0/27
B.10.188.31.0/26
C.10.188.31.0/29
D.10.188.31.0/28
E.10.188.31.0/25
Refer to the exhibit.A network technician is asked to design a small network with redundancy. The exhibit represents this design， with all hosts configured in the same VLAN. What conclusions can be made about this design？（）
A.The design will function as intended
B.Spanning-tree will need to be used.
C.The router will not accept the addressing scheme.
D.The connection between switches should be a trunk.
E.The router interfaces must be encapsulated with the 802.1Q protocol.
A.Configure the switch to be in VTP client mode.
B.Configure the switch to be in VTP domaint mode.
C.Configure the switch to be in VTP transparent mode.
D.Configure the switch to be in VTPv2.
A.show interfaces interface
B.show interfaces interface trunk
C.show interfaces interface switchport
D.show ip interface brief
E.show interfaces vlan
Refer to the exhibit.After a RIP route is marked invalid on Router_1， how much time will elapse before that route is removed from the routing table？（）
A.30 seconds
B.60 seconds
C.90 seconds
D.180 seconds
E.240 seconds
A.proxy
B.dual-stack
C.tunneling
D.dot1q
A.user EXEC mode
B.global configuration mode
C.privileged EXEC mode
D.auxiliary setup mode
A.Router(config)#router ospf 1
B.Router(config)#router ospf 0
C.Router(config)#router ospf area 0
D.Router(config-router)#network 192.168.16.0 0.0.0.255 area 0
E.Router(config-router)#network 192.168.16.0 0.0.0.255 0
F.Router(config-router)#network 192.168.16.0 255.255.255.0 area 0
Refer to the exhibit.S0/0 on R1 is configured as a multipoint interface to communicate with R2 and R3 in the hub-and-spoke Frame Relay topology. While testing this configuration， a technician notes that pings are successfully from hosts on the 172.16.1.0/24 network to hosts on both the 172.16.2.0/25 and 172.16.0.2.128/25 networks. However， pings between hosts on the 172.16.2.0/25 and 172.16.2.128/25 network are not successful. What could explain this connectivity problem？（）
A.The ip subnet-zero command has been issued on the R1 router.
B.The RIPv2 dynamic routing protocol cannot be used across a Frame Relay network.
C.Split horizon is preventing R2 from learning about the R3 networks and R3 from learning about R2 networks.
D.The 172.16.2.0/25 and 172.16.2.128/25 networks are overlapping networks that can be seen by R1,but not between R2 and R3.
E.The 172.16.3.0/29 network used on the Frame Relay links is creating a discontiguous network between the R2 and R3 router subnetworks.
A.when a packet is received from an 802.1Q trunk,the vlan id can be determined from the source MAC address table
B.unkown unicast frames are retransmitted only to the ports that belong to the same vlan
C.ports between switches should be configured in access mode so that vlans can span across the ports
D.broadcast and multicast frames are retransmitted to ports that are configured on different vlan.
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