Chapter 7 - Network Architecture

Question 1

What is an Unmanaged Switch?

Answer 1

A Switch, at layer 2 of the OSI model, that uses UPnP (Universal Plug-and-Play) capabilities with limited configuration options

Question 2

What is a Managed Switch?

Answer 2

A Switch that can be configured via command line or via GUI

Question 3

What is STP?

Answer 3

Spanning Tree Protocol - a protocol that prevents loops in network traffic by artificially blocking the connections that would complete a loop

Question 4

What is the least cost path?

Answer 4

A path that that STP designates what is most efficient for Frames

Question 5

What is the BPDU?

Answer 5

Bridge Protocol Data Unit - STP info is transmitted between switches via BPDUs

Question 6

What are the “shutdown” and “no shutdown” commands?

Answer 6

shutdown - To disable unused physical & virtual ports on switches
no shutdown - To enable unused physical & virtual ports on switches

Question 7

What is defense in depth?

Answer 7

Security strategy to implement security in layers

Question 8

What is the Core Layer in Switch Hierarchical Design?

Answer 8

Highly efficient multilayer switches or routers that support the networks backbone

Question 9

What is the Distribution/Aggregation Layer in Switch Hierarchical Design?

Answer 9

Highly redundant mesh of connections between multilayer switches or routers

Question 10

What is the Access/Edge Layer in Switch Hierarchical Design?

Answer 10

A work group of switches connected directly to hosts/workstations

Question 11

What is East-West-Traffic?

Answer 11

Flow of Traffic between peers within a network segment

Question 12

What is North-South-Traffic?

Answer 12

Traffic that must leave the local segment to reach its desination

Question 13

What is the Spine Layer in Switch Hierarchical Design?

Answer 13

Switches on the backbone connect to every switch on leaf layer but not with each other (Core & Distribution layer combined)

Question 14

What is the Leaf Layer in Switch Hierarchical Design?

Answer 14

Same as the Access/Edge layer - A work group of switches connected directly to hosts/workstations

Question 15

What is SDN?

Answer 15

Software Defined Networking - A modern approach to managing & controlling networks that is centralized

Question 16

What is the Infrastructure/Data plane?

Question 17

What is bridge mode?

Question 18

What is NAT mode?

Answer 18

vNIC relies on host machine to act as NAT decide, hypervisor acts as a DHCP server - VM obtain IP addressing information from its host

Question 19

What is Link/Port aggregation?

Answer 19

The combination of multiple network interfaces to act as one logical interface

Question 20

What is Iaas?

Question 21

What is PaaS?

Question 22

What is SaaS?

Question 23

What is XaaS?

Question 24

What is IaC?

Question 25

What is Orchestration?

Answer 25

Automate many tasks to work together in a complex workflow

Question 26

What is EoR (end of row) switching?

Answer 26

A rack architecture in which switches in a rack at the end of the row serve as the connection points to the network for all other devices in the row.

Question 27

What is ToR (top of rack) switching?

Answer 27

A rack architecture where one switch on each rack serves as the connection point to the network for all other devices on the rack.