Network Fundamentals

Question 1

Key Words to Associate for Exam:
1) Confidentiality
2) Integrity
3) Availability

Answer 1

1) Confidentiality – Encryption
2) Integrity – Hashing
3) Availability – Redundancy and Resiliency

Question 2

1) Devices that users access the network with (such as workstations, laptops, phones, tablets, etc.)

2) Provides resources to the network

3) Older network devices that connect other devices like clients and servers over a local area network (LAN)

4) “Smarter hubs” that provide more security and more efficient bandwidth utilization

5) Used to connect different networks together

6) Security barriers between internal networks and the external world (usually the Internet)

7) Devices or software that distribute network or application traffic across multiple servers (prevents any one server from becoming a bottleneck, improving overall network performance)

8) In Software-Defined Networking (SDN) context, these are central units used to manage flow control to networking devices

9) In networking, refers to the physical materials used to transmit data (such as cables)

Answer 2

1) Clients
2) Servers
3) Hubs
4) Switches
5) Routers
6) Firewall
7) Load Balancers
8) Controllers
9) Media

Question 3

3 stages of evolution of the Hub

Answer 3

Hubs –> Bridges –> Switches

Question 4

Allows wireless devices to connect to a wired network

Answer 4

Wireless Access Points (WAPs/APs)

Question 5

1) Intrusion system that detects unauthorized access or anomalies and alerts admins

2) Intrusion system that not only detects threats, but also takes action to prevent intrusion

Answer 5

1) Intrusion Detection Systems (IDS)
2) Intrusion Prevention System (IPS)

Question 6

Dedicated file storage system that provides data access to a heterogeneous group of clients

Answer 6

Network-attached Storage (NAS) Device

Question 7

High-speed network that provides access to consolidated block-level data storage

Answer 7

Storage Area Network (SAN)

Question 8

What are the 2 main networks models?

Answer 8

1) Client/Server Model
2) Peer-to-Peer Model

Question 9

1) Smallest type of wired or wireless network which usually covers a distance about 10 feet or less.

2) Area network type that connects components in a limited distance, generally up to about 100 meters or 300 feet

3) A building-centric LAN that is spread across numerous buildings in a certain area (such as colleges or military bases)

4) Connects locations that are scattered cross the entire city

5) Connects geographically disparate internal networks

Answer 9

1) Personal Area Network (PAN)

2) Local Area Network (LAN)

3) Campus Area Network (CAN)

4) Metropolitan Area Network (MAN)

5) Wide Area Network (WAN)

Question 10

What IEE standards are used for Wi-Fi? And for Ethernet?

Answer 10

1) IEE 802.11 standard – Wi-Fi
2) IEE 802.3 standard – Ethernet

Question 11

Wired Network Topologies

1) Simplest form of network topology that involves a direct connection

2) A network configuration where each device is connected to two other devices, forming a circular data path (FDDI - Fiber Distributed Data Interference)

3) All of the network devices are connected to a single central cable, called the bus or backbone

4) One of the most common network layouts that is in use today

5) A variation of the star topology where the central node (hub) is connected to multiple nodes (spokes)

6) Features a point-to-point connection between every single device on the network to create a robust and redundant network

Answer 11

1) Point-to-Point Topology

2) Ring Topology (mostly legacy)

3) Bus Topology (mostly legacy)

4) Star Topology (most common/modern)

5) Hub-and-spoke Topology (used in airlines)

6) Mesh Topology

Question 12

Wireless Network Topologies

1) The most common type of wireless network that uses a wireless access point as a centralized point

2) Decentralized wireless network which creates Peer-to-Peer connections and does not require a router or access point

3) An interconnection of different types of nodes, devices, and radios. Essentially two or three or four different technologies are combined to create a mesh network

Answer 12

1) Infrastructure Mode

2) Ad Hoc Mode

3) Wireless Mesh Topology

Question 13

Data movements in a datacenter
1) Entering datacenter
2) Leaving datacenter
3) Moving within datacenter

Answer 13

1) Southbound – Entering
2) Northbound – Leaving
3) East-West – Moving within

Question 14

Datacenter topologies

Answer 14

1) Three-tiered hierarchy
2) Collapsed core
3) Spine and leaf architecture
4) Traffic flows