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. Head of a packet contains...






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






3. Session hijacking countermeasure






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






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






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






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






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






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






10. 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






11. Acts as an organizations internal phone system






12. IDS response method using logging and notification






13. 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






14. Used to pass data from one VLAN to another






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. Monitors network traffic to identify possible attacks






17. 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






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






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






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






21. Malicious activity not reported or detected






22. Capture and analyze network traffic - also known as packet analyzer - sniffer - network analyzer






23. Used by ISPs - single public network IP address is shared among many hosts on a private network - also known as PAT






24. Type of IP addresses not routed on the internet: 10.x.x.x - 172.16.x.x - 192.168.x.x






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






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






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






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






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






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






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






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






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






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






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






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






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






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






39. Packets with a forged source IP address - purpose to conceal the identity of the sender or impersonate another computing system






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






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






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






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






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






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






46. 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






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






48. Level 2 firewall often used to filter web traffic






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






50. 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