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






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






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






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






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






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






7. Used to pass data from one VLAN to another






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






9. A variation of a smurf attack using UDP






10. Attack where an attacker intercepts traffic and tricks parties at either end into believing they are communicating with each other






11. A flaw in TCP/IP to verify that a packet really comes from the addess indicated in the IP header leads to this attack






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






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






14. An attack where an attacker captures sensitive information and sends it again later in an attempt to replicate the transaction






15. A logical connection point allowing computers and software to communicate and exchange data






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






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






18. A pool of public IP addresses is shared by a collection of private IP addresses






19. IPS response method - terminate process/session - block/reject and redirect network traffic






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






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






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






23. 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






24. 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






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






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






27. Session hijacking countermeasure






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






29. Level 2 firewall often used to filter web traffic






30. Take control of a session between a server and client - the users gets kicked off the session while the attacker inserts himself into the session by sending a reset request to the client






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






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






33. One device per network segment - does not use local system resources - can't examine encrypted traffic - OS independent - less expensive






34. Head of a packet contains...






35. Ping flooding - ping of death - smurf - fraggle - SYN flood - land - teardrop - email flood






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






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






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






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






40. Two authoritative sources for your domain namespace with differing contents depending on whether the query is internal or external






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






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






43. 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






44. Malicious activity not reported or detected






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






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






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






48. Well known ports - allow administrative access - used for network services - considered only ports allowed to transmit traffic thru a firewall






49. 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






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