và người dùng doanh nghiệp và cung cấp kết nối các mô-đun Internet WAN và doanh nghiệp. Những phân đoạn được cung cấp thông qua việc triển khai các VLAN. Một chuyển đổi Layer 3 cũng cung cấp cho một dòng bổ sung của bảo vệ chống lại các cuộc tấn công nội bộ thông qua việc sử dụng các kiểm soát truy cập | 330 Appendix A Answers to the Do I Know This Already Quizzes and Q A Sections 9. What are two methods that antisniffer tools use to detect the possible presence of a sniffer Antisniffer tools can detect changes in the response time of hosts to determine whether the hosts are processing more traffic than their own. Other software can run on the host and detect whether the network interface has entered promiscuous mode which is necessary to facilitate sniffing activities. 10. How do password-testing tools work Password-testing programs such as LC4 Crack and John the Ripper can take a list of known passwords and try various case changes and the addition of nonalphanumeric characters. They then encrypt these passwords and compare them against the stored hashes in the password file. If they match then the password has been cracked. Chapter 10 Do I Know This Already Quiz 1. b e 2. e 3. b 4. b 5. d e 6. b 7. c 8. e 9. c 10. d 11. a d 12. b d Q A 1. The flow of network management traffic that follows the same path as normal data is referred to as a n -band traffic flow. In Chapter 10 331 2. Of the three remote-access protocols discussed in this chapter which is the least secure and why Telnet. Data including usernames and passwords is sent in clear text. 3. What is the primary goal of SAFE in reference to network management The secure management of all devices and hosts within a network. 4. Give the reason for using tunneling protocols with management protocols. The main reason for tunneling a management protocol is to secure a normally insecure protocol. An example would be the tunneling of TFTP data. Without tunneling this data is sent in clear text and is vulnerable to various attacks. Additionally the remote management of a device that is outside of your management domain benefits from the use of a tunneling protocol such as IPSec. 5. Out-of-band management normally uses a n network for management traffic. Parallel 6. Name two usage categories that network .
