Questions and Answers
What is the primary function of a storage area network (SAN) in a traditional data center?
What type of traffic is characterized by data moving between systems within the data center?
Which of the following devices are involved in north-south traffic?
What is the primary purpose of a boot drive in a data center?
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What type of traffic is characterized by data leaving and entering the data center?
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Which of the following devices are involved in east-west traffic?
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What is the primary function of a hard drive in a traditional data center?
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What is the term used to describe data moving into and out of the data center?
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What is the primary goal of a data center in terms of high availability?
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What is the term used to describe the concept of sharing the effort among two or more systems to enable a process to work?
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What is the term used to describe a group of servers connected together to appear as a single logical device?
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What is the benefit of using multipathing in a SAN?
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What is the term used to describe a network architecture that uses software-defined networking?
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What is the primary purpose of special-purpose load balancers?
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What is the term used to describe the concept of providing critical systems with high availability and redundancy?
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What is the primary benefit of using clustering in a data center?
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What is the primary function of a central location in a growing organization?
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What is a characteristic of branch offices in a growing organization?
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What is a key difference between traditional data centers and modern data centers?
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What is the primary role of a server in a modern data center?
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What is the primary benefit of software-defined networking in a modern data center?
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What is a characteristic of monolithic devices in traditional data centers?
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What is the primary difference between on-premises data centers and colocation data centers?
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What is a key consideration for organizations with branch offices and a central data center?
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What is the primary purpose of a physical network diagram?
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What is the main function of the wiring room in a data center?
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What is the primary purpose of the network operations center (NOC)?
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What is the term for the area in the server farm where heat can be dissipated away from the servers?
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What is the purpose of the air conditioning units in a data center?
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What is the term for the documentation that includes the dimensions and locations of rooms, racks, and other components in a data center?
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What is the purpose of the raised floor in a data center?
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What is the tool used to create physical network diagrams?
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What is the main purpose of the MDF in the data center?
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What is included in the detailed rack diagram for each rack?
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What is the purpose of the rack diagram in Figure 16-15?
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What is the difference between the MDF and IDF?
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What is the purpose of the logical network diagrams?
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What is included in the MDF documentation?
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What is the purpose of the upper-level floor plan?
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What type of documentation accompanies the MDF racks?
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Study Notes
Data Center Traffic Flows
- North-South traffic: data moving into and out of the data center
- Northbound traffic: leaves the data center
- Southbound traffic: enters the data center
- Network devices involved in north-south traffic: edge routers, edge firewalls, and load balancers
- East-West traffic: data moving between systems within the data center
- Network devices involved in east-west traffic: internal routers, internal firewalls, and switches
Data Storage
- Data storage: where data rests in a data center
- Mass storage devices: hard drives, tape backups, and solid-state drives (SSDs)
- Storage area network (SAN): connects individual systems to a centralized bank of mass storage
The Modern Data Center
- Introduction of virtualization and software-defined networking changed the data center
- Virtualization: physical servers running multiple virtual servers
- Software-defined networking (SDN): interconnections that once used dedicated switches
- High availability (HA) in the data center: ensuring critical systems have high availability
High Availability
- Load balancing: sharing effort among multiple systems to enable a process to work
- Redundancy: ensuring critical systems have multiple components
- Facilities and infrastructure support: providing reliable power, cooling, and connectivity
Physical Network Diagrams
- Physical network diagrams: map out physical aspects of the data center
- Tools used for layout: Microsoft Visio, Wondershare Edraw, and diagrams.net
- Floor plans: include dimensions and locations of rooms, racks, hot and cold aisles, and more
- Rack diagrams: detailed diagrams of each rack with component information
- MDF/IDF documentation: detailed documentation of main distribution frame and intermediate distribution frames
Logical Network Diagrams
- Logical network diagrams: show the connectivity among devices in the network
- Essential network documentation: includes logical network diagrams, line drawings, and more
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Description
Learn about the different types of traffic flows in a data center, including north-south traffic that moves into and out of the center, and east-west traffic that moves within the center.