Domain 1.7

Question 1

Define and explain SDN

Answer 1

Software Defined Networking - Refers to the capabilities of networking devices to have different functional planes of operation.

Examples would be Data, Control, and management planes.

Question 2

Explain the function of the infrastructure/data plane of SDN

Answer 2

This allows for the processing of network frames and packets

This is where packet/frame forwarding, NAT, Trunking and encryption occurs

Question 3

Explain the function of the Control Layer/Control plane of SDN

Answer 3

This layer is used for the management of the data plane,

routing tables, session tables, and NAT tables.

Dynamic routing updates are also handled in this functional plane.

Question 4

Explain the function of the Application/ management plane of SDN

Answer 4

This functional layer of SDN is used for configuring and managing devices.

Question 5

Explain three tier archetecture

Answer 5

There are three levels for the enterprise.

The Core, the Distribution, the Access layers.

Question 6

Explain the Core of three tier archetecture

Answer 6

Center of the network, where servers databases, and applications live.

Many people will need access to the services that are stored here.

The Downtown of the network - where everyone travels and spends their time being productive

Question 7

Explain the distribution of three tier architecture.

Answer 7

A midpoint between the core and the users.

Communication between access switches.

Manages the path to the end users.

Question 8

Explain the access layer of the three tier architecture

Answer 8

• Where end users connect
  -Endpoints, and printers

Question 9

Explain spine and leaf architecture

Answer 9

The north south data south to a spine rack

the south bound data then flows to a leaf switch

The south bound data then flows to the endpoint.

The

Question 10

Explain the relationship and connection properties of the spine and leaf architecture

Answer 10

Each leaf switch is connected to each spine switch.

Each spine switch connects to each leaf switch.

Leaf switches do not connect to one another.
Spine switches do not connect to other spine switches.

Question 11

What is “top of rack” switching

Answer 11

Refers to spine and leaf architecture.

each leaf is on the top of a physical network rack.

This may include a group of physical racks

Question 12

What are the advantages and disadvantages of spine and leaf architecture

Answer 12

Advantages - simple cabling, redundant connections, and fast

Disadvantages - additional switches may be costly, and space requirements for networking equipment.

Question 13

Describe a SAN, its pros and cons

Answer 13

Storage Area Network -

Looks and feels like a local storage device.

Pros:
-Block Level Access
-Very effcient read and write

Cons:
- May require a great deal of bandwidth

May require isolated network to deliver consistent service

Question 14

Describe FC

Answer 14

Fibre Channel -
A specialized high speed topology

-Used to connect servers to storage

-2, 4, 8, 16 GB data rates

• Can work over both Fiber and Copper

Question 15

What are the requirements for a fibre channel switch

Answer 15

There are two components

Sever & Storage

• Server (initiator) needs an FC interface
• Storage (Target) is commonly referenced via SCSI, SAS, or SATA commands

Question 16

What is FCoE

Answer 16

Fibre Channel over Ethernet

• No special networking needed compared to standard FC
• Usually integreates with an existing FC infrastructure
• Non routable, LAN/Subnet specific

Question 17

Describe iSCSI

Answer 17

Internet Small Computer Systems Interface -

-sends SCSI commands over an IP network

• Makes remote disks look and operate like a local disk (like FC)
• Easily managed within software and has drivers available for many OSes
• ## No proprietary hardware or topologies needed.