Network equipment supporting the use of flow control mechanisms has been recently installed. What is the purpose of flow control in a data network?（）
第1题：
Even though current technologies make the ultimate segmented network impractical, new technologies and products hold the promise of making the concept a reality. Most important of all these new technologies are (66) . The ultimate switched LAN, which is technically possible, now, exhibits the following characteristics:
1. High-speed yet cost-effective switching devices can be implemented on a wide scale, providing dedicated connections for individual users and supporting the aggregate (67) of all networked users.
2. The ability to deploy switching capabilities incrementally into the (68) base. Switching implementations support switching of individual users or groups so that existing users of shared media modules can continue to use the existing equipment until they can justify moving to dedicate switched LAN connections.
3. Support and enhancement of existing routed environments. Switching (69) routint, but rather can be introduced into the network without making any changes to the existing routing equipment or configuration.(70) play a critical role in the integration of switching into existing networks.
A．switch-based LANs
B．WANs
C．user services
D．LAN-BY-PHONE
第2题：
While troubleshooting a network outage, you discover that an employee brought a switch from home into the office to connect additional equipment to the network. In order to increase his speed, he connected this switch to both network ports in his office, resulting in a bridge loop.Which of these can you implement to prevent future occurrences of this issue?（）
A.RSTP
B.root guard
C.BPDU guard
D.GLBP
第3题：
As the Ezonexam network administrator, you are required to have a firm understanding of the OSI model. Why does the data communication industry use the layered OSI reference model? (Choose two)
A．It enables equipment from different vendors to use the same electronic components, thus saving research and development funds
B．It encourages industry standardization by defining what functions occur at each layer of the model
C．It divides the network communication process into smaller and simpler components; thus aiding component development, design and troubleshooting
D．It provides a means by which changes in functionality in one layer require changes in other layers
E．It supports the evolution of multiple competing standards and thus provides business opportunities for equipment manufacturers
第4题：
What is a benefit of implementing a Cisco End-to-End Solution?（）
第5题：
A.Allow users to develop their own approach to network security
B.Physically secure network equipment from potential access by unauthorized individuals
C.Encourage users to use personal information in their passwords to minimize the likelihood of passwords being forgotten
D.Delay deployment of software patches and updates until their effect on end-user equipment is well known and widely reported
E.Minimize network overhead by deactivating automatic antivirus client updates
第6题：
Rapid advances in computer and communication technologies have resulted in the(71) merger of these two fields. The lines have bluned among computing, switching, and digital transmission equipment, and the same digital techniques are being used for data, voice, and image transmission. Merging and evolving technologies, coupled with increasing demands for efficient and timely collection, processing, and(72) of information, are leading to the development of(73) that transmit and process all types of data. The ultimate goal of this evolution is something its proponents-some of the most powerful forces in the computing and telecommunications industries-call the (74) .The (74) will be a worldwide public telecommunications network that will deliver a wide variety of services. The (74) will be defined by the standardization of user interfaces, and will be implemented as a set of digital switches and paths supporting a broad range of traffic types and providing (75) processing services. Inpractice, there will be multiple networks, implemented within national boundaries, but from the user's point of view there will be a single, uniformly accessible worldwide network.
A．decreasing
B．increasing
C．collective
D．single
第7题：
A. It ensures that data is retransmitted if an acknowledgment is not received.
B. It reassembles segments in the correct order on the destination device.
C. It provides a mechanism for the receiver to control the transmission speed.
D. It regulates the size of each datagram segment.
E. All of the above are functions of flow control
第8题：
()is preservation of confidentiality, integrity and availability of information, in addition, other properties such as authenticity, accountability, non-repudiation and reliability can also be involved。
A、Equipment security
B、Network security
C、Information security
D、Content security
第9题：
Which of the following are considered common elements found in a set of network documents？（Choose all that apply.）（）
第10题：
In the plan phase， network readiness assessment addresses which customer need？ Select exactly 1 answer（s） from the following：（）。