1. CCNA Cisco Certified Network No. 4
전공영어
CCNA Cisco Certified Network No. 4
MK in Kaist
(금)

2. 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

3. 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

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

5. 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.

6. 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

7. 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.)

8. 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

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

10. 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

11. 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.

12. 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

13. 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

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

15. 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

16. 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

17. 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

18. 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

19. 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

20. 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.)

21. The subnet mask in use is 255.255.255.192.
The IP address can be assigned to hosts in VLAN1
The IP address 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 (B). So the range of VLAN 1 is to , and for VLAN 2 it is to This puts the IP address into VLAN 1 (C). The router needs an IP address from each VLAN so it can route packets between them (F).