CCNA Cisco Certified Network No. 4 전공영어 CCNA Cisco Certified Network No. 4 MK in Kaist 2015. 9. 25(금)

QUESTION 56 What is one benefit of PVST+? PVST+ reduces the CPU cycles for all the switches in the network. PVST+ automatically selects the root bridge location, to provide optimize. PVST+ allows the root switch location to be optimized per VLAN. PVST+ supports Layer 3 load balancing without loops. Correct Answer: C Section: Switching Explanation

QUESTION 57 As a network technician, do you know which are valid modes for a switch port used as a VLAN trunk? (Choose three.) transparent auto on desirable blocking forwarding Correct Answer: BCD Section: VLAN Explanation

QUESTION 58 How many broadcast domains are shown in the graphic assuming only the default VLAN is configured on the switches?

one six twelve two Correct Answer: A Section: Introduction Explanation Explanation/Reference: Routers separate broadcast domains. Hubs and switches extend broadcast domains (if we neglect VLANs). There are no routers in the diagram, so there is only one broadcast domain.

QUESTION 59 Which three of these statements regarding 802.1Q trunking are correct? (Choose three.) 802.1Q native VLAN frames are untagged by default. 802.1Q trunking ports can also be secure ports. 802.1Q trunks can use 10 Mb/s Ethernet interfaces. 802.1Q trunks require full-duplex, point-to-point connectivity. 802.1Q trunks should have native VLANs that are the same at both ends. Correct Answer: ACE Section: VLAN

QUESTION 60 Refer to the exhibit. The output that is shown is generated at a switch. Which three of these statements are true? (Choose three.)

All ports will be in a state of discarding, learning, or forwarding. Thirty VLANs have been configured on this switch. The bridge priority is lower than the default value for spanning tree. All interfaces that are shown are on shared media. All designated ports are in a forwarding state. This switch must be the root bridge for all VLANs on this switch. Correct Answer: ACE Section: VLAN Explanation

QUESTION 61 Refer to the exhibit. At the end of an RSTP election process, which access layer switch port will assume the discarding role?

Switch3, port fa0/1 Switch3, port fa0/12 Switch4, port fa0/11 Switch4, port fa0/2 Switch3, port Gi0/1 Switch3, port Gi0/2 Correct Answer: C Section: Switching Explanation

QUESTION 62 Which term describes a spanning-tree network that has all switch ports in either the blocking or forwarding state? spanned converged provisioned redundant Correct Answer: B Section: Switching Explanation Explanation/Reference: The only two states that switch ports in a converged Spanning Tree network can have are bloced or forwarding.

QUESTION 63 What are the possible trunking modes for a switch port? (Choose three.) transparent auto on desirable client forwarding Correct Answer: BCD Section: VLAN Explanation

QUESTION 64 Which two of these statements regarding RSTP are correct? (Choose two.) RSTP cannot operate with PVST+. RSTP defines new port roles. RSTP defines no new port states. RSTP is a proprietary implementation of IEEE 802.1D STP. RSTP is compatible with the original IEEE 802.1D STP. Correct Answer: BE Section: Switching Explanation

QUESTION 65 Refer to the exhibit. Which two statements are true of the interfaces on Switch1? (Choose two.)

Interface FastEthernet0/2 has been disabled. Multiple devices are connected directly to FastEthernet0/1. FastEthernet0/1 is configured as a trunk link. FastEthernet0/1 is connected to a host with multiple network interface cards. FastEthernet0/5 has statically assigned MAC addresses. A hub is connected directly to FastEthernet0/5. Correct Answer: CF Section: Switching Explanation

QUESTION 66 Three switches are connected to one another via trunk ports. Assuming the default switch configuration, which switch is elected as the root bridge for the spanning-tree instance of VLAN 1? the switch with the highest MAC address. the switch with the lowest IP address. the switch with the lowest MAC address the switch with the highest IP address. Correct Answer: C Section: Switching Explanation

QUESTION 67 What are three advantages of VLANs? (Choose three.) VLANs establish broadcast domains in switched networks. VLANs utilize packet filtering to enhance network security. VLANs provide a method of conserving IP addresses in large networks. VLANs provide a low-latency internetworking alternative to routed networks. VLANs allow access to network services based on department, not physical location. VLANs can greatly simplify adding, moving, or changing hosts on the network. Correct Answer: AEF Section: VLAN Explanation

QUESTION 68 Which two benefits are provided by using a hierarchical addressing network addressing scheme? (Choose two.) reduces routing table entries. auto-negotiation of media rates. efficient utilization of MAC addresses. dedicated communications between devices. ease of management and troubleshooting. Correct Answer: AE Section: IP Routing Explanation

QUESTION 69 What is the alternative notation for the IPv6 address B514:82C3:0000:0000:0029:EC7A:0000:EC72? B514:82C3:0029::EC7A:0000:EC72 B514:82C3:0029:EC7A:EC72 B514:82C3::0029:EC7A:0:EC72 B514:82C3::0029:EC7A:EC72 Correct Answer: C Section: IPv6 Explanation

QUESTION 70 Refer to the diagram. All hosts have connectivity with one another. Which statements describe the addressing scheme that is in use in the network? (Choose three.)

The subnet mask in use is 255.255.255.192. The IP address 172.16.1.25 can be assigned to hosts in VLAN1 The IP address 172.16.1.205 can be assigned to hosts in VLAN1 The LAN interface of the router is configured with one IP address. The LAN interface of the router is configured with multiple IP addresses. Correct Answer: BCF Section: VLAN Explanation Explanation/Reference: With over 62 hosts in each VLAN, the subnet size for each must be at least /25 which is the same as 255.255.255.128 (B). So the range of VLAN 1 is 172.16.1.0 to 172.16.1.127, and for VLAN 2 it is 172.16.1.128 to 172.16.1.255. This puts the IP address 172.16.1.25 into VLAN 1 (C). The router needs an IP address from each VLAN so it can route packets between them (F).