D315 Network And Security Foundations Frequently Tested Actual Exam Questions With Correct Answers

D315 NETWORK AND SECURITY FOUNDATIONS
FREQUENTLY TESTED ACTUAL EXAM QUESTIONS
WITH CORRECT ANSWERS
Question 1.
Which layer of the OSI model does a bridge use to make decisions about forwarding data
packets?

ANSWER
layer 2 - datalink



Question 2.
Which protocol provides remote access over encrypted connections?

ANSWER
Secure shell (SSH) protocol - layer 7 - application layer mainly



Question 3.
What does the address resolution protocol (ARP) cache map?

ANSWER
It's used to associate a device's IP address with its MAC address, which is needed for a device to send
data to another device on the same network



Question 4.
Which transmission control protocol/Internet protocol (TCP/IP) layer performs addressing and
routing?

ANSWER
Network layer



Question 5.
How does a Smurf attack operate?

ANSWER
It spoofs the source address for all ICMP packets. A Smurf attack attempts to spoof the source
address of ICMP packets and broadcast to the network in an attempt to flood it.



Question 6.
Which device provides web content filtering and URL scanning?

ANSWER
firewalls




1

,Question 7.
7 Application Layer cols

ANSWER
Application software, network applications. Anything you can see with your eyeballs like web
browsers and email.



Question 8.
6 Presentation Layer

ANSWER
Data conversion utilities. Protocol Conversion, data translation. Data encryption/decryption.



Question 9.
Presentation layer protocols

ANSWER
SSL, ASCII, JPEG, MIDI, MPEG, GIF, MP3, MP4



Question 10.
5 Session layer

ANSWER
Network Operating System. Establishes, manages & terminates sessions



Question 11.
Session layer protocols

ANSWER
NFS, SQL, PPTP, NetBIOS, PAP, SCP (tunneling)



Question 12.
4 Transport Layer

ANSWER
Network Operating System. Ensures Error Free Packets (segments)



Question 13.
Transport layer protocols

ANSWER
TCP (segments so no missing packets), UDP (datagrams for streaming like games), SCTP




2

,Question 14.
3 Network Layer

ANSWER
Router, Layer 3 switches. Provides routing decisions. NAT, PAT (packets)



Question 15.
Network Layer protocols

ANSWER
IP, IPX, IPSec, RIP, IPv4, IPv6, ICMP



Question 16.
2 Data Link Layer

ANSWER
Switches, NIC, Token Ring, Frame Relay, Bridge. Provides for flow of data. NIC FUNCTIONS at this
layer. Bits pass over physical layer between devices on a LAN (collision domain). (frames)



Question 17.
Data Link Layer protocols

ANSWER
MAC addresses, ARP, PPP, HDLC, LLC Communication at MAC-address level - forwards packets on
Layer 2 devices, like a bridge.



Question 18.
1 Physical Layer

ANSWER
802.11, Repeater, Modem, Bluetooth, Ethernet, hubs, Network Cabling, Wi-Fi. Signals & Media.
(bits)



Question 19.
Physical layer protocols

ANSWER
DSL, ISDN, physical NICs, twisted pair cable, fiber. Questions about "medium" refer to cabling.



Question 20.
TCP/IP model layer 4 - Application

ANSWER
OSI Layer 7, 6, 5 = Application, Presentation, Session




3

, Question 21.
TCP/IP model layer 3 - Transport

ANSWER
OSI Layer 4 = Transport



Question 22.
TCP/IP model layer 2 - Network

ANSWER
OSI Layer 3 = Network



Question 23.
TCP/IP model Layer 1 = Network Interface/Physical

ANSWER
OSI Layers 2 & 1 = Datalink & Physical



Question 24.
Such as which 3 OSI layers are in the TCP/IP Application layer?

ANSWER
Application, Presentation, Session



Question 25.
tion

ANSWER
Contains message, supports network applications.



Question 26.
Presentation layer function

ANSWER
Coding, compression, encryption. Protocol Conversion, data translation.



Question 27.
Session layer function

ANSWER
Aggregates connections for efficiency, synchronization, recovery. Establishes, maintains, terminates
connection.




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