Test your basic knowledge |

Comptia Security +: Network Security

Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Well known ports - allow administrative access - used for network services - considered only ports allowed to transmit traffic thru a firewall






2. A feature of firewalls / routers that disguise the IP address of internal systems allowing connection to the Internet using one public address






3. Level 1 firewall that looks at the head of a packet - (not content) - operates rapidly - application independent - either allow or deny packets






4. A method - used by switches and email servers - of delivering messages which are temporarily held by an intermediary before being sent to their final destination






5. Monitors network traffic to identify possible attacks






6. Generate random TCP sequence numbers and encrypt traffic countermeasure what attacks






7. Most common DMZ implementation using three firewall interfaces (internet - intranet - DMZ)






8. Level 2 firewall often used to filter web traffic






9. Head of a packet contains...






10. User / registered ports






11. An attack where fragmented UDP packets with odd offset values are sent to the victim - when the OS attempts to rebuild the fragments they overwrite each other and cause confusion






12. A sniffer mode used to capture traffic addressed to/from another machine on the network






13. Multiple network defense components are placed throughout the organizations assets and the network is properly segmented






14. Network configuration that permits selected outsiders access internal information systems






15. Evolved from IDS - monitors network traffic - detects and responds to attack on network






16. An attacker redirects traffic by falsifying the IP address requested by ARP request






17. Cable designed for transmission at higher speeds (100Mbps - 2Gbps) and longer distances (2km) - expensive -eliminates signal tapping






18. A ping message is broadcast to an entire network with a spoofed source IP addess of the victim computer - flooding the victim computer with responses during this attack






19. IP spoofing attack where the attacker can monitor packets and participate in bidirectional communication






20. Twisted pair cable with speed capability of 1Gbps






21. Known as thinnet - 10mbps - limited to 185 meters






22. Collection on honeypots






23. A server that sits between an intranet and it's Internet connection - masking all IP addresses






24. Forging an IP address with the address of a trusted host






25. Connects two or more subnets - determines the best path to forward packets based on packet header and forwarding table information






26. Malicious activity not reported or detected






27. A decoy system - intentionally left exposed to attract/distract attackers - logs and monitors attacker activities






28. Connects devices together to form a subnet - broadcasts incoming packets to all devices






29. An application layer gateway works at this layer of the OSI model






30. Seeks to reduce the probability and/or impact of a specific risk below an acceptable threshold






31. Firewall that intercepts and inspects messages before delivering them - placed between trusted and untrusted networks - degrade network traffic - also know as application gateway






32. Bbenign activity reported as malicious






33. A variation of a smurf attack using UDP






34. IDS that relies on usage patterns and baseline operation - can ID new vulnerability - high rate of false alarms






35. Firewall that communicates directly with a perimeter router and the internal network - 2 NICs - screens internal traffic






36. Man in the middle attack where the content of an intercepted message is altered before it is sent on






37. Known as thicknet - 10mbps - limited to 500 meters






38. IP - email - website - DNS - and ARP






39. An attacker redirects valid request to malicious sites by feeding a DNS server altered records which are retained in its cache






40. A packet filtering firewall works at this layer of the OSI model






41. Variation of the SYN flood where SYN packets are spoofed to have the same source and destination IP address and port






42. A locked down/hardened host on the public side of the firewall highly exposed to attacks (i.e. web server - email server)






43. Promiscuous NIC to sniff passing traffic - admin NIC to send alerts to centralized management system






44. Dynamic / private ports






45. A firewall that checks all layers of a packet including content - verifying an expected response to a current communication session - also call a deep packet inspection






46. Firewall with several NICs connected to different networks






47. A person or program masquerades as another by presenting false information to gain an illegitimate advantage






48. Packet filtering - proxies - stateful inspection






49. Allows all traffic except traffic that is specifically denied - also known as permissive access






50. Bastion host - dual homed firewall - multi homed firewall - screened host - screened subnet