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Latest and Most Accurate CompTIA SY0-401 Dumps Exam Questions and Answers:
The network security engineer just deployed an IDS on the network, but the Chief Technical Officer (CTO) has concerns that the device is only able to detect known anomalies. Which of the following types of IDS has been deployed?
A. Signature Based IDS
B. Heuristic IDS
C. Behavior Based IDS
D. Anomaly Based IDS
A signature based IDS will monitor packets on the network and compare them against a database of signatures or attributes from known malicious threats.
B, C: The technique used by anomaly-based IDS/IPS systems is also referred as network behavior analysis or heuristics analysis.
D: An IDS which is anomaly based will monitor network traffic and compare it against an established baseline. The baseline will identify what is “normal” for that network- what sort of bandwidth is generally used, what protocols are used, what ports and devices generally connect to each other- and alert the administrator or user when traffic is detected which is anomalous, or significantly different, than the baseline.
Joe, the Chief Technical Officer (CTO), is concerned about new malware being introduced into the corporate network. He has tasked the security engineers to implement a technology that is capable of alerting the team when unusual traffic is on the network. Which of the following types of technologies will BEST address this scenario?
A. Application Firewall
B. Anomaly Based IDS
C. Proxy Firewall
D. Signature IDS
Anomaly-based detection watches the ongoing activity in the environment and looks for abnormal occurrences. An anomaly-based monitoring or detection method relies on definitions of all valid forms of activity. This database of known valid activity allows the tool to detect any and all anomalies. Anomaly-based detection is commonly used for protocols. Because all the valid and legal forms of a protocol are known and can be defined, any variations from those known valid constructions are seen as anomalies.
A: An application aware firewall provides filtering services for specific applications.
C: Proxy firewalls are used to process requests from an outside network; the proxy firewall examines the data and makes rule-based decisions about whether the request should be forwarded or refused. The proxy intercepts all of the packets and reprocesses them for use internally.
D: A signature-based monitoring or detection method relies on a database of signatures or patterns of known malicious or unwanted activity.
Stewart, James Michael, CompTIA Security+ Review Guide, Sybex, Indianapolis, 2014, pp. 16, 20
Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex, Indianapolis, 2014, p. 98
The security administrator at ABC company received the following log information from an external party:
10:45:01 EST, SRC 10.4.3.7:3056, DST 184.108.40.206:80, ALERT, Directory traversal
10:45:02 EST, SRC 10.4.3.7:3057, DST 220.127.116.11:80, ALERT, Account brute force
10:45:03 EST, SRC 10.4.3.7:3058, DST 18.104.22.168:80, ALERT, Port scan
The external party is reporting attacks coming from abc-company.com. Which of the following is the reason the ABC company’s security administrator is unable to determine the origin of the attack?
A. A NIDS was used in place of a NIPS.
B. The log is not in UTC.
C. The external party uses a firewall.
D. ABC company uses PAT.
PAT would ensure that computers on ABC’s LAN translate to the same IP address, but with a different port number assignment. The log information shows the IP address, not the port number, making it impossible to pin point the exact source.
A: A network-based IDS (NIDS) watches network traffic in real time. It’s reliable for detecting network-focused attacks, such as bandwidth-based DoS attacks. This will not have any bearing on the security administrator at ABC Company finding the root of the attack.
B: UTC is the abbreviation for Coordinated Universal Time, which is the primary time standard by which the world regulates clocks and time. The time in the log is not the issue in this case.
C: Whether the external party uses a firewall or not will not have any bearing on the security administrator at ABC Company finding the root of the attack.
Which of the following security devices can be replicated on a Linux based computer using IP tables to inspect and properly handle network based traffic?
Ip tables are a user-space application program that allows a system administrator to configure the tables provided by the Linux kernel firewall and the chains and rules it stores.
A: A sniffer is a tool used in the process of monitoring the data that is transmitted across a network.
B, D: A router is connected to two or more data lines from different networks, whereas a network switch is connected to data lines from one single network. These may include a firewall, but not by default.
Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex, Indianapolis, 2014, p. 342
Which of the following firewall types inspects Ethernet traffic at the MOST levels of the OSI model?
A. Packet Filter Firewall
B. Stateful Firewall
C. Proxy Firewall
D. Application Firewall
Stateful inspections occur at all levels of the network.
A: Packet-filtering firewalls operate at the Network layer (Layer 3) and the Transport layer (Layer 4) of the Open Systems Interconnect (OSI) model.
C: The proxy function can occur at either the application level or the circuit level.
D: Application Firewalls operates at the Application layer (Layer7) of the OSI model.
Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex, Indianapolis, 2014, pp. 98-100
Stewart, James Michael, CompTIA Security+ Review Guide, Sybex, Indianapolis, 2014, p. 6
The Chief Information Security Officer (CISO) has mandated that all IT systems with credit card data be segregated from the main corporate network to prevent unauthorized access and that access to the IT systems should be logged. Which of the following would BEST meet the CISO’s requirements?
D. Web proxies
E. Layer 2 switches
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