1.1 Reliable Networks

Question 1

FAULT TOLERANCE

Answer 1

A Fault Tolerant Network is one that can continue operations without interruptions when one or more components of the network fail.

Question 2

REDUNDANCY

Answer 2

Having multiple paths to a destination.
Is one the ways to make a network fault tolerant.

Question 3

PACKET SWITCHING

Answer 3

Implementing a packet-switched network is one way that reliable networks provide redundancy.
Packet switching splits traffic into packets that are routed over a shared network.

Question 4

SCALABILITY

Answer 4

A scalable network expands quickly to support new users and applications.
Additional users and whole networks can be connected to the internet without degrading performance for existing users.

Scalability happens when designers follow accepted standards and protocols.

Question 5

QUALITY OF SERVICE QoS

Answer 5

The focus of QoS is to prioritize time-sensitive traffic.
The type of traffic, not the content of the traffic, is what is important.

Question 6

NETWORK SECURITY

Answer 6

Securing the network infrastructure includes physically securing devices that provide network connectivity and preventing unauthorized access to the management software that resides on them.

In order to achieve the goals of network security, there are three primary requirements.

Confidentiality - Data confidentiality means that only the intended and authorized recipients can access and read data.
Integrity - Data integrity assures users that the information has not been altered in transmission, from origin to destination.
Availability - Data availability assures users of timely and reliable access to data services for authorized users.