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. 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






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






3. Examines a entire packet and determines action based on a complex set of rules






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






5. Collection on honeypots






6. Dynamic / private ports






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






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






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






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






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






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






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






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






15. One process on every system - use local system resources - detect attacks that NIDS misses - examine data after decrypted - can be OS specific - more expensive






16. Unauthenticated connections - creating the potential for a successful connection as an anonymous user






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






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






19. One private IP address is mapped to one public IP address






20. Acts as an organizations internal phone system






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






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






23. IP spoofing attack where the attacker can only send packets and has to guess about replies






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






25. A logical division of a computer network - in which all nodes can reach each other by broadcast at the data link layer - equivalent to a VLAN






26. Packet filtering - proxies - stateful inspection






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






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






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






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






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






32. Cable used most in networks - maximum speed 1Gbps - maximum length 100 meters - susceptible to tap






33. Malicious activity not reported or detected






34. A group of hosts on logical network segment that communicate as if they were attached to the same broadcast domain - regardless of their physical location






35. 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






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






37. User / registered ports






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






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






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






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






42. 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






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






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






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






46. Bbenign activity reported as malicious






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






48. A complete transfer of all DNS zone information from one server to another






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






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