Gsec Practice Exam Questions & Answers.

GSEC PRACTICE EXAM QUESTIONS &
ANSWERS.
What are the layers of the OSI Model from top to bottom? - CORRECT ANSWER Application,
Presentation, Session, Transport, Network, Data Link and Physical



What are the layers of the TCP/IP Model from top to bottom? - CORRECT ANSWER Application,
Transport, Internet and Link Layer



What is the address space used for loopback addressing? - CORRECT ANSWER 127.0.0.0 -
127.255.255.255



What is the address space used when a DHCP server is not available? - CORRECT ANSWER 169.254.0.1 -
169.254.255.255



What are the private IP ranges? - CORRECT ANSWER 10.0.0.0 - 10.255.255.255, 172.16.0.0 -
172.31.255.255, 192.168.0.0 - 192.168.255.255



What protocols are used in the Data Link Layer? - CORRECT ANSWER Ethernet, Point to Point Protocol
(PPP) and ADCCP (Advanced Data Communication Control Protocol)



What protocols is utilized in the Network Layer? - CORRECT ANSWER Internet Protocol (IP)



What protocols are utilized in the Transport Layer? - CORRECT ANSWER UDP and TCP



What protocols are utilized on the Session Layer? - CORRECT ANSWER NetBIOS



What types of formats are used at the presentation layer? - CORRECT ANSWER XML and JPEG



What layer of the OSI model does encrypting and decrypting take place? - CORRECT ANSWER
Presentation Layer

,What protocols are utilized at the Application Layer? - CORRECT ANSWER SMTP, IMAP, POP, NTP and
HTTP



What protocols are utilized inside the Link Layer? - CORRECT ANSWER Ethernet



What layers does the Link layer correspond to in the OSI Model? - CORRECT ANSWER Physical and Data
Link



What protocols are utilized inside the Internet layer? - CORRECT ANSWER Internet Protocol (IP)



What protocols are utilized inside the Transport layer of the TCP/IP Model?? - CORRECT ANSWER TCP
and UDP



What protocols are utilized within the Application Layer of the TCP/IP model? - CORRECT ANSWER
Telnet, Simple Network Management Protocol (SNMP), HTML, LDAP, FTP, SSH



What layers of the OSI Model comprise the TCP/IP layers Application Layer? - CORRECT ANSWER
Session, Presentation and Application



What protocol is a support protocol within the TCP/IP Suite? - CORRECT ANSWER Internet Control
Message Protocol (ICMP)



What range is the Class A IP Range? - CORRECT ANSWER 0.0.0.0-127.255.255.255



What range is the Class B IP Range? - CORRECT ANSWER 128.0.0.0-191.255.255.255



What range is the Class C IP Range? - CORRECT ANSWER 192.0.0.0-223.255.255.255



What range is the Class D IP Range? - CORRECT ANSWER 224.0.0.0-239.255.255.255

,What range is the Class E IP Range? - CORRECT ANSWER 240.0.0.0 - 254.255.255.255



Name some physical network topologies. - CORRECT ANSWER Bus, Star, Rings, Star-Bus Hybrid, Mesh



What network model uses a lot of cable because you need to use home runs back to the switch or hub?
- CORRECT ANSWER Star



In general peer-to-peer networks are often? - CORRECT ANSWER Mesh Networks



TOR is a peer-to-peer network that provides anonymity for its users by doing what? - CORRECT ANSWER
Masking the original source IP address from the destination



What makes a Full Mesh topology different than a Mesh topology? - CORRECT ANSWER A full mesh
topology does not have have nodes that are minimally connected to the rest of the network. In a full
mesh topology every node is connected to every other node



A Token Ring network topology makes use of what device to make the network behave like a ring in
spite of being labeled like a star? - CORRECT ANSWER Multistation Access Unit (MAU)



What device allows messages to move around on layer 2 of the OSI model? - CORRECT ANSWER Switch



What messages are limited to the local area network only and would never be used to look up
information outside of the local network? - CORRECT ANSWER ARP



What "transfer mode" is utilized primarily in large-scale networks to facilitate getting messages to
destination quickly? - CORRECT ANSWER Asynchronous Transfer Mode (ATM)



What are the two types of virtual circuits? - CORRECT ANSWER Permanent Virtual Circuit (PVC) and
Switched Virtual Circuit (SVC)

, What makes PVC's different than SVC's? - CORRECT ANSWER Permanent Virtual Circuits (PVC's) are
permanent and need to be configure manually, while Switched Virtual Circuits (SVC's) are dynamic in
nature and a device in the network would have to request one to be configured



How do switches make packet sniffing harder? - CORRECT ANSWER You cannot plug into a switch port
and see all of the traffic passing through it like you can on a hub



What does the CIA triad stand for? - CORRECT ANSWER Confidentiality, Integrity and Availability



This router is often used to do a broad level of filtering of traffic that just shouldn't be hitting your
network, like that sourced from private addresses. - CORRECT ANSWER Border Router



What does a router base its routing decisions off of? - CORRECT ANSWER Destination IP Address aka the
Destination Address in the network or the layer 3 header



A first match firewall will perform the action specified based on what? - CORRECT ANSWER The rule that
is matched first



A best match firewall will perform the action specified based on what? - CORRECT ANSWER It will find
the best or most specific match in the rules to perform its action



What two modes does the File Transfer Protocol utilize? - CORRECT ANSWER Active and Passive



A firewall that does deep packet inspection is consider to be? - CORRECT ANSWER Protocol Aware



What are examples of Application Layer Gateways? - CORRECT ANSWER Proxy Server or Web Proxy



Firewalls often perform what function? - CORRECT ANSWER Network Address Translation (NAT)



What are some protocols Network Address Translation (NAT) can cause problems for? - CORRECT
ANSWER VoIP protocols like SIP and FTP