In broadcast network the first adj of ospf is 2-way？why？this question will give you a picture.

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参考答案和解析

正确答案:yes，in broadcast network DRothers only establish full adjacency with DR and BDR.Between Drothers，it is a 2-way relationship.

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第1题：

Which of the following a true statements regarding the use of VLANs to segment a network? (Select three)

A. They increase the size of collision domains

B. They allow logical grouping of users by function.

C. They can enhance network security.

D. They increase the size of the broadcast domain while decreasing the number of collision domains.

E. They increase the number of broadcast domains while decreasing the size of the broadcast domains.

F. They simplify switch administration.

正确答案：BCE
B,C,E 解析：Explanation:
VLANs are used to segment a LAN into multiple, smaller LANs. This can be used to enhance security as local traffic from one VLAN will not be passed to users in other VLANS.

Incorrect Answers:
A. VLANs are used to decrease the size of a collision domain, not increase it.

D. The opposite is true.

F. The default operation of a switch is to allow all traffic and to enable all ports in VLAN1. The use of VLANs will increase the complexity of the switch environment, making for more difficult administration.

第2题：

If all OSPF routers on a broadcast network have the same OSPF priority, what parameter is used to determine the new BDR at the time of a DR failure?()

A. area ID

B. router ID

C. loopback address

D. IP address of interface on broadcast network

参考答案：B

第3题：

Ezonexam has implemented the use of VLANs in their network. Which of the following are considered to be a benefit of VLANs? (Choose three)

A. They increase the size of collision domains.

B. They allow logical grouping of users by function.

C. They can enhance network security,

D. The increase the size of broadcast domains while decreasing the number of the broadcast domains.

E. The increase the number of broadcast domains while decreasing the size of the broadcast domains.

F. They simplify switch administration.

正确答案：BCE
B,C,E 解析：Explanation:
There are many motivations for using VLANs, including these:
1. To group users by department, or by groups that work together, instead of by physical location. (B)
2. To reduce overhead by limiting the size of each broadcast domain (E)
3. To enforce better security by keeping sensitive devices on a separate VLAN (C)
4. To separate specialized traffic from mainstream traffic - for example, putting IP telephones on a separate VLAN form. user PCs.

第4题：

What are three benefits of implementing vlans？（）

A、A more efficient use of bandwidth can be achieved allowing many physical groups to use the same network infrastructure
B、Broadcast storms can be mitigated by decreasing the number of broadcast domains，thus increasing their size
C、A higher level of network security can be reached by separating sensitive data traffic from other network traffic
D、Port-based vlans increase switch-port use efficient，thanks to 802.1Q trunks
E、A more efficient use of bandwidth can be achieved allowing many logical networks to use the same network infrastructure
F、Broadcast storms can be mitigated by increasing the number of broadcast domains，thus reducing theirsize
G、VLANs make it easier for IT staff to configure new logical groups，because the vlans all belong to thesame broadcast domain

正确答案:C,E,F

第5题：

Which of the following statements describe the network shown in the graphic?()

A. There are two broadcast domains in the network.

B. There are four broadcast domains in the network.

C. There are six broadcast domains in the network.

D. There are four collision domains in the network.

E. There are five collision domains in the network.

F. There are seven collision domains in the network.

参考答案：A, F

第6题：

Which OSPF router will advertise a Type 2 network LSA for a broadcast network segment?()

A.A

B.B

C.C

D.D

参考答案：A

第7题：

What parameters must you specify when you enable EIGRP routing?()

A. The broadcast address, and AS number

B. The network number and AS number

C. EIGRP routing, network number and passive interface

D. EIGRP routing, network number, and AS

参考答案：D

第8题：

VE1 is a switch in the Ezonexam network. Why will VE1 never learn the broadcast address?

A. Broadcast frames are never sent to switches

B. A broadcast frame. is never forwarded by a switch

C. Broadcasts only use network layer addressing

D. A broadcast address will never be the source address of a frame

E. Broadcast addresses use an incorrect format for the switching table

F. None of the above

正确答案：D
D

第9题：

On which types of network will OSPF elect a backup designated router()。

A.point-to-point and multiaccess

B.point-to-multipoint and multiaccess

C.point-to-point and point-to-multipoint

D.nonbroadcast and broadcast multipoint

E.nonbroadcast and broadcast multiaccess

参考答案：E

第10题：

How are VTP advertisements delivered to switches across the network?（）

A、anycast frames
B、multicast frames
C、broadcast frames
D、unicast frames

正确答案:B

In broadcast network

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