CMIT 265: Fundamentals of Networking

CMIT 265 introduces UMGC students to how networks are designed and how data moves across them, and it unlocks many later CMIT courses.

UMGC describes it as an introduction to networking technologies for local area networks, wide area networks and wireless networks.

The aim is to recognize the type of network design appropriate for a given scenario, and topics include the OSI (open system interconnection) model, security and networking protocols. It is designed to help prepare for the CompTIA Network+ certification exam.

Students often find two things hard: thinking in layers, and IP addressing. Once those click, design scenarios become much more approachable.

What CMIT 265 Covers

• Network types: LANs, WANs and wireless networks, and when each fits.
• The OSI model: seven layers that describe how communication works.
• Protocols: TCP/IP, DNS, DHCP, HTTP and others.
• Addressing: IPv4, subnetting and an introduction to IPv6.
• Security: basic threats and protections for networks.
• Design: choosing an appropriate design for a scenario.

Key Concepts Explained

The OSI Model

Subnetting

A subnet mask splits an IP address into network and host parts. Borrowing host bits creates more, smaller subnets.

TCP Versus UDP

TCP is connection-oriented and reliable, used for web pages and email. UDP is connectionless and faster, suited to streaming, voice and DNS queries where speed matters more than guaranteed delivery.

Wireless Networking Basics

UMGC lists wireless networks alongside LANs and WANs. Design scenarios often hinge on a few wireless decisions:

• Frequency bands: 2.4 GHz reaches further but is crowded; 5 GHz and 6 GHz offer more speed and channels over shorter range.
• Standards: newer 802.11 standards (Wi-Fi 5, 6 and 6E) increase capacity for busy spaces.
• Security: WPA2 is the minimum and WPA3 is preferred; open networks need isolation.
• Coverage: access point placement and channel planning reduce interference.

Justify each choice against the scenario, for example a dense open-plan office versus a warehouse with long distances.

Approaching a Network Design Scenario

UMGC's stated aim is recognizing the right design for a scenario. A structured answer usually covers:

1. Requirements: users, locations, applications and growth.
2. Topology and media: wired, wireless or both.
3. Addressing plan with subnets for each group.
4. Key devices: switches, routers, access points, firewall.
5. Security measures and justification for each choice.

Typical Assignments and How to Approach Them

Where Students Get Stuck

• Subnet maths. Practice until block sizes (4, 8, 16, 32, 64, 128) are automatic.
• Layer confusion. Switches mostly work at layer 2, routers at layer 3.
• Unjustified designs. Every device and choice should answer a requirement.
• Port memorization. Common ports appear constantly in Network+ material.

Study Tips for CMIT 265

• Do a few subnetting problems every day rather than many at once.
• Use a packet capture tool in labs to see protocols in action.
• Draw diagrams by hand before using a tool.
• Read the current Network+ exam objectives for scope.

How We Help with CMIT 265

Send the design scenario, lab instructions, rubric and your work. A networking tutor can explain OSI and protocol concepts, prepare worked subnetting solutions, or review your design report. For technical write-up structure, see our lab report guide.

GradeEssays is independent of the University of Maryland Global Campus and CompTIA. We tutor and explain; we never take quizzes or exams, sit certification exams, or log in to your classroom or lab accounts.