Network Security

Question 1

What is Network Security?

Answer 1

• The control of unwanted intrusion

Question 2

network security includes:

Answer 2

• Monitoring for abuses
• Looking for protocol errors
• Blocking nonapproved transmissions
• Responding to problems promptly and accurately

Question 3

Goals of Network Security

Answer 3

• Ensure the confidentiality of resources
• protect the integrity of data
• enforce access control
• maintain the availability of IT infrastructure
• ensure the privacy of personally identifiable data
• monitor the IT environment for violation of policy

Question 4

how Organizations measure success by:

Answer 4

• How well the stated security goals are accomplished
• How well security standards are maintained

Question 5

Good network security:

Answer 5

• Relies on interweaving of multiple effective security components
• Requires constant vigilance

Question 6

Security:

Answer 6

• It is an ongoing effort that constantly changes to meet the challenge of new threats
• Requires network security professionals to continually learn and adapt

Question 7

Senior managment

Answer 7

• Has ultimate and final responsibilities
• must ensure the creation of written security policy
• assign to designing, writing and executing for the security plan

Question 8

Security Staff

Answer 8

• Manages all assets , system vulnerability , imminent threats , pertinent defense
• Design , writes and maintain security throughout the organization

Question 9

Managers and supervisors

Answer 9

• Ensure employees have tools and resources to accomplish their work
• Ensure the workers are trained and posses the necessary skills

Question 10

Wireless network

Answer 10

• can be inexpensive to deploy
• convenient
• support mobility
• universal

Question 11

Wireless concerns

Answer 11

• Introduce new attack surface
• Data is transmitted over the air and is accessible
• Network can be directly accessed from a distance

Question 12

Internal and External Issues

Answer 12

• Malicious code
• unauthorized software
• unethical employees
• Complex network infrastructure
• zero-day exploits
• Information leakage

Question 13

Common Network Security Components Used to Mitigate Threats:

Answer 13

• Firewalls
• VPNS
• Directory services
• Hosts and nods
• Domain name system
• IDS/IPS
• Proxy servers
• Network access control
• Network address translation

Question 14

What does node include ?

Answer 14

• Client computer
• firewalls
• router
• switches
  and anything with the network interface that have a MAC address.

Question 15

Media Access control Address (MAC)

Answer 15

• A 48-bit hardware address of a network interface card (NIC) and manufacturer

Question 16

Host

Answer 16

• Is a form of node that has a logical address assign to it

Question 17

Network Layer

Answer 17

includes client, proxy, servers, firewalls and router.

Question 18

Firewalls

Answer 18

• Can be a hardware of software
• deploy to enforce the access control policy on network communication
• Filter network traffic for harmful exploits
• goal to protect a local system or network of system from network-based threats

Question 19

The General Model of a Firewall

Answer 19

• The firewall is inserted between the premises network and the Internet