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. 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






2. Malicious activity not reported or detected






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






4. Unauthenticated Windows session where an attacker can gather list of users - groups - machines - shares - user and host SID






5. Blocks all traffic from passing through the firewall except for traffic that is explicitly allowed - also known as restrictive access - best practice






6. Head of a packet contains...






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






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






9. Firewall with several NICs connected to different networks






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






11. 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






12. 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






13. A physical or logical subnetwork that houses systems accessible to a larger untrusted network - usually the Internet - also known as DMZ






14. Amplifies the signal of incoming packets before broadcasting them to the network






15. Protocol used to map an known IP address to its corresponding media access control (MAC) address






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






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






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






19. Monitors network traffic to identify possible attacks






20. Firewall with two NICs - one internal and one external facing - NAT is often used with this firewall






21. Examines content passing through and makes a decision on the data based on a set of criteria - normal uses email filtering and web browsing






22. A DoS attack that subverts the normal "three way handshake" of TCP/IP by sending SYN packets - but no corresponding ACK packets






23. Bbenign activity reported as malicious






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






25. Dynamic / private ports






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






27. Session hijacking countermeasure






28. Man in the middle attack where the attacker captures the traffic and sends it to the original recipient without altering the intercepted data






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






30. A variation of a smurf attack using UDP






31. IDS that relies on the identification of known attack signatures






32. Cable with copper core - has no physical transmission security and is easy to tap - 10mbps - maximum length 500 meters






33. Crashing a computer by sending oversized packets (over 64 bytes) that it doesn't know how to handle






34. Used to pass data from one VLAN to another






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






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






37. Collection on honeypots






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






39. Attempt to block service or reduce activity by overloading the victim machine with ping requests






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






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






42. User / registered ports






43. A set of rules computers use to communicate with each other across a network






44. A logical group of computers connected via a switch/hub that share the same network prefix in their IP address






45. A level 3 firewall that remembers / tracks network connections - maintains a state table - distinguish which side of a firewall a connection was initiated - higher security






46. Connects devices together to form a subnet - packet forwarding is based on MAC addresses - works at the data link layer of the OSI






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






48. Malicious insiders - connections that bypass the firewall (i.e. IM) - encrypted traffic/tunneling - social engineering - physical access are missed by ___________






49. When a hacker takes over a TCP session between two machines - also known as session hijacking - foiled by the use of encrypted sessions






50. 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