4- Network Infrastructure

Question 1

Network Infrastructure

Answer 1

the collection of devices and cabling that facilitates network communications among an organization’s systems, as well as between the organization’s systems and those belonging to other organizations.

Question 2

Enterprise Architecture

Answer 2

It includes the overall set of infrastructures that facilitate access to applications and information and the ongoing activity carried out by one or more persons such as Enterprise Network Architect, Enterprise data Achitect, Enterprise System Engineer, or Enterprise Security Architect.

Question 3

Goals of enterprise architecture:

Answer 3

• Scalability: Design networks and storage so they can easily be expanded when needed.
• Agility: Design should be flexible to meet new goals and objectives.
• Transparency: High level and detailed diagrams be readily available. No secret
• Consistency: Employ identicals architectures in all location to facilitate troubleshooting.
• Repeatability: Consistency brings repeatability
• Efficiency: Repeatability and consistency yield efficiency.
• Resilience: to make infrastructure available in the event of failure of individual components or in case of maintenance.

Question 4

Network Architectures

Answer 4

The complete framework of an organization’s computer network, including network communications

Question 5

Network Architecture includes :

Answer 5

• Physical network architecture: Physical locations of network equipment and media.
• Logical network architecture: include several layers, network protocols, traffic routing, security zones, and the utilization of carrier services.
• Data flow architecture: RElated to application and data architecture.
• Network standards and services; More involved with the services that are used on the network.

Question 6

Classification type of Network

Answer 6

• PAN : Several feet up to 3 meters
• Lan : Hundreds of feet, up to 100 meters
• CAN : A few mile
• MAN Dozen of miles
• WAN Hundred to thousand of miles

Question 7

Personal area network (PAN)

Answer 7

• Used by a single individual, connect peripherals and communication devices for use by the individual
• Reach ranges up to 3 meters

Question 8

Local Area Network (LAN)

Answer 8

• Connect computers and devices together in a small building or a residence.
• Reach ranges up to 100 meters.

Question 9

Campus area network (CAN)

Answer 9

• interconnect LANs of an organization that has buildings in close proximity.
• Reach range up to a few miles.

Question 10

Metropolitan area Network (MAN)

Answer 10

• A network that spans a city or regional area

* Reach ranges up to dozens of miles

Question 11

Wide Area Network (WAN)

Answer 11

• Network’s size ranges from regional to international

* Reach ranges from hundred to thousand miles

Question 12

What is the maximum lenght for an Eternet cable

Answer 12

• 100 meters; the same as the maximum size of a LAN.

Question 13

Network Based Service

Answer 13

Protocols and utilities that facilitate system-and network-based resource utilization.

Question 14

Email servers

Answer 14

Collect, store, and transmit e-mail messages from person to person.

Question 15

Remote access

Answer 15

permits an authorized user to remotely access network-based services from anywhere on the internet via an encrypted tunnel that logically connects the user to the enterprise network as though they were physically there. This is done through VPN

Question 16

DNS

Answer 16

provides translation between resource name and IP address

Question 17

Virtual workstation

Answer 17

Workstation run operating system that are actually stored on central servers

Question 18

Time synchronization protocols

Answer 18

Allow an organizations’ time server system to make sure that all other servers and workstation time clocks are synchronized.

Question 19

Network connectivity and authentication

Answer 19

Help to prevent non organizations-owned or non compliant workstations from being able to connect to an internal network, which is a potential security threat.

Question 20

Protocols and technologies used to connect, verify, and authenticate devices to a network

Answer 20

Dynamic Host Configuration protocol (DHCP), 802.1x, and network access control (NAC) .

Question 21

Web security appliances

Answer 21

Examine incoming content for malware, in much the same way that a workstation checks incoming files for viruses.

Question 22

centralized anti-malware

Answer 22

console that help security engineers to quickly spot workstations whose ant-malware is not functioning and force new anti-malware update to all users workstations. They can also receive virus alerts on workstation.

Question 23

Network management system

Answer 23

These systems serve as a collection point for all alerts and error messages from vital servers and network devices. They can also be used to centrally configure network devices, making wide-scale configuration changes possible by a small team of engineers working in a NOC. Network management systems also measure network performance, throughput, latency, and outages, giving network engineers vital information on the health of the enterprise network.