Which of the following are correct definitions of defences: a. Stateless firewalls maintain a list of running sessions and permit unchecked access once a session is on the list b. Denial of service attacks affect the confidentiality of data on a network Oc. Dorothy Denning was a pioneer in developing Intrusion Detection Systems Od. Stateless firewalls do not process every single packet that passes through them ☐ e. Intrusion Detection Systems are based partly on the hypothesis that exploiting a system's vulnerabilities is likely to result in abnormal network activity Of. Proxy firewalls carry out external network access on behalf of clients on the internal network

Which of the following are correct definitions of defences: a. Stateless firewalls maintain a list of running sessions and permit unchecked access once a session is on the list b. Denial of service attacks affect the confidentiality of data on a network Oc. Dorothy Denning was a pioneer in developing Intrusion Detection Systems Od. Stateless firewalls do not process every single packet that passes through them ☐ e. Intrusion Detection Systems are based partly on the hypothesis that exploiting a system's vulnerabilities is likely to result in abnormal network activity Of. Proxy firewalls carry out external network access on behalf of clients on the internal network

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Given have a firewall between the Internet (represented by a cloud) and your network router. And some active attacks are added from the list of active attacks; os exploits, viruses, trojans, etc. Please refer to the diagram attached. Are these attacks able to get to your network? Do you feel your system is secure? What’s wrong with this scenario?
Suppose a user employs one-time passwords as above (or, for that matter, reusable passwords), but that the password is transmitted sufficiently slowly. (a) Show that an eavesdropper can gain access to the remote server with a relatively modest number of guesses. (Hint: The eavesdropper starts guessing after the original user has typed all but one character of the password.) (b) To what other attacks might a user of one-time passwords be subject?
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