Security Foundations D481 - Questions With Efficient Solutions

Security Foundations D481 - Questions With
Efficient Solutions
A set of protocols made up of four layers (Application, Transport,
Network, Network Interface Layer) used to connect network devices
to each other Right Ans - TCP/IP (Transmission Control
Protocol/Internet Protocol)


TCP/IP model layer that establishes how data should be physically
sent through the network.


Ethernet




In conjunction with layers 1 PHYSICAL and 2 DATA LINK Right
Ans - Network Interface Layer (TCP/IP)


TCP/IP model layer that defines the logical transmission protocols
for the whole network.


- IP ( Internet Protocol)
- ARP ( Address Resolution Protocol)
- ICMP (Internet Contol Message Protocol)

,- IGMP


in conjunction with layer 3 NETWORK of the OSI Model. Right
Ans - Network Layer (TCP/IP)


TCP/IP model layer that s responsible for the end-to-end transport
of data. The protocols that live in this layer are.


- TCP (Transmission Control Protocol)
- UDP (User Datagram Protocol)


In conjunction with layer 4 TRANSPORT of the OSI Model Right
Ans - Transport Layer (TCP/IP)


TCP/IP model layer that is responsible for the communication
protocols between nodes. The protocols in this layer include.


- HTTP (Hyper Text Transfer Protocol)
- SSH (Secure Shell)
- FTTP
- Telnet
- NTP (Network Time Protocol)

,- DHCP
- PING


In conjunction with Layers 5 SESSION, 6 PRESENTATION, AND 7
APPLICATION of the OSI model. Right Ans - Application Layer
(TCP/IP)


Layer 1 of the OSI Model responsible for the physical connections of
the devices in the network. This layer is implemented through the
use of devices such as hubs, repeaters, modem devices, and physical
cabling. Right Ans - Physical Layer (OSI model)


Layer 2 of the OSI Model responsible for the error-free delivery of
data to the receiving device or node. This layer is implemented
through the use of devices such as switches and bridge devices, as
well as anything with a network interface, like wireless or wired
network cards. Right Ans - Data Link Layer (OSI Model)


Layer 3 of the OSI Model responsible for the transmission of data
between hosts in different networks as well as routing of data
packets. This layer is implemented through the use of devices such
as routers and some switches. Right Ans - Network Layer (OSI
Model)

, Layer 4 of the OSI Model provides services to the application layer
and receives services from the network layer and is responsible for
the reliable delivery of data. It segments and reassembles data in the
correct order for it to be sent to the receiving device. It may also
handle the reliable delivery of data and any retries of data that are
lost or corrupted (for example, TCP does this). This layer is often
called the heart of OSI. Right Ans - Transport Layer (OSI Model)


Layer 5 of the OSI Model responsible for connection establishment,
session maintenance, and authentication. Right Ans - Session
Layer (OSI Model)


Layer 6 of the OSI Model responsible for translating data from the
application layer into the format required to transmit the data over
the network as well as encrypting the data for security if encryption
is used. Right Ans - Presentation Layer (OSI Model)


Layer 7 of the OSI Model responsible for network applications (like
HTTP or FTP) and their production of data to be transferred over
the network. Right Ans - Application layer (OSI model)


A device that is necessary for sending and receiving data. They allow
computers to transport digital information over analog lines such as
phone or cable lines. The three types of these devices include cable,
DSL, and satellite.