Module Two Assignments

Understanding Switches

TCP/IP and Subnet Masking

Understanding SOHO Routers

Introduction to Wireshark

Client/Server and Peer-to-Peer Networking

Network Review

The New New Thing Project

Network Review

Protocols and Addresses

Part One

  1. In a networking context, what is a protocol?

    2. A common language that allows communication between two devices.

  2. What is the major protocol used on the Internet?

    3. Transmission Control Protocol/Internet Protocol, or TCP/IP, is the major protocol used on the Internet.

  3. At what OSI/ISO layer does IP operate?

    4. IP operates at layer 3, the network layer.

Part Two

  1. What three pieces of information do you need to configure TCP/IP?

    2. The IP address, subnet mask, and default gateway are all needed to configure TCP/IP.

  2. Is the IP address a single address?

    3. No. It is a combination of network ID and host ID.

  3. When was classfull addressing last used?

    4. According to Professor Messer, the last time class full addressing was used was in 1993.

  4. What are the three major classes of addresses?

    5. The three major classes are A, B, and C.

Part Three

  1. What is DNS? What does it do?

    2. DNS is the Domain Name System, which matches the web address (URL) entered at the application layer with its corresponding IP address.

  2. What is DHCP? What does it do?

    3. DHCP, or Dynamic Host Configuration Protocol, helps automatically generate and assign TCP/IP addresses to devices.

  3. Which proprietary Microsoft protocol was used in early versions of Microsoft Windows?

    4. NetBEUI, or NETBIOS Extended User Interface.

  4. Which protocol is used to resolve a fully qualified domain name to an IP address?

    5. DNS, or Domain Name System.

Common Ports

Part One

  1. In a TCP/IP context, what is a port?

    2. A port is a logical opening in a network that allows the transmission or receipt of information.

  2. What is a non-ephemeral port?

    3. A non-ephemeral port is a permanent port number.

  3. What is meant by the term "well known" port?

    4. 'Well known' ports use the same numbering scheme to communicate with each other.

  4. Compare and contrast TCP and UDP ports.

    5. TCP and UDP both use ports from numbers 0-65535, but are completely different protocols. TCP is connection oriented where as UDP is connectionless.

Part Two

  1. What port does the DNS service utilize?

    2. DNS utilizes port UDP/53.

  2. What port does the HTTPS protocol utilize?

    3. HTTPS utilizes port TCP/443.

  3. What is the protocol SMTP and what port does it use?

    4. SMTP, or Simple Mail Transfer Protcol, is used to send email on the Internet. It uses port TCP/25.

Network Technologies

  1. How does Professor Messer define a network?

    2. Professor Messer states that a network is a way to connect devies using copper wires, optic fibers, and radio signals.

  2. What is a network Topology? And who makes Network Topology Standards?

    3. Network topology is a standardized way to connect devices. The IEEE defines network topology standards.

  3. What is the most popular form of consumer networking?

    4. Ethernet is the most popular form.

  4. What is the term that describes a network that can communicate in both directions at the same time?

    5. Full-duplex.

  5. What differentiates a LAN from a WAN?

    6. A LAN is a local area network and communicates in a small area, such as a home or office building. A WAN, or wide area network, expands to much larger area and needs the assistance of a third party to communicate with all devices within its network. A LAN is able to communicate with all these devices on its own.

IPv4 and IPv6

  1. What is the most widely used protocol in the world?

    2. IPv4.

  2. Compare and contrast the lenghts of IPv4 and IPv6.

    3. IPv4 addresses are 32 bits in length, whereas IPv6 are 128 bits in length.

  3. Is this a valid IPv4 address: "192.1.325.12"?

    4. No, because 325 is a higher value than is allowed (maximum 255).

  4. Is this a valid IPv6 address: "a::b::c"?

    5. No, because no more than one set of double colons (::) is permitted.

Network Cabling and Connectors

Part One

  1. What is the alliance of trade associations that makes network cabling standards?

    2. ANSI (American National Standards Institute), TIA (Telecommunication Industry Association), and EIA (Electronic Industries Alliance).

  2. What is the Commercial Building Telecommunications Cabling Standard that we use for cabling?

    3. ANSI/TIA/EIA-568 are the standards for cabling.

  3. What is the most common physical type of cabling?

    4. Twisted pair copper cabling is the most common.

  4. What category of copper cable supports 100 Mbits Ethernet?

    5. Cat5.

  5. What category of copper cable supports 10 Gbits Ethernet through 55 meters?

    6. Cat6.

Part Two

  1. What is plenum rated cable?

    2. Plenum rated cabling is that which is rated to run through a plenum, meaning it is not flammable and can be run through air vents.

  2. What type of cable did Ethernet originally use? Hint, same type of cable as used in cable TV.

    3. Coaxial cable.

  3. What is the type of cable that is most suited for sending signals a long distance?

    4. Fiber optic cable, specifically single-mode fiber.

  4. If you were connecting machines within a data cetner, what type of fiber would you be most likely to use?

    5. Multi-mode fiber optic cable.

  5. If you were connecting two remote buildings, what type of fiber would you be most likely to use?

    6. Single-mode fiber optic cable.

  6. What type of jack would you use for Ethernet?

    7. RJ-45.

  7. What type fo jack would a phone use?

    8. RJ-11.

Network Types

Part One

  1. What high speed type of network runs over telephone lines?

    2. DSL, or Digital Subscriber Line.

  2. What type of high speed network runs over coax cable?

    3. Cable modem.

  3. Which of the popular types of home high speed networks utilizes non-terrestrial networks that typically have high latency?

    4. Satellite.

Part Two

  1. What was Bluetooth originally designed to replace?

    2. It was intended to replace slow wired networks.

  2. What type of network would Bluetooth create?

    3. PAN, or Personal Area Network.

Wireless Networking

Part One

  1. What is the IEEE family of standards for wireless networking?

    2. 802.11.

  2. How do the different members of the 802.11 family differ?

    3. They have differences in speed, range, channels, and frequencies.

  3. Which 802.11 standard utilizes MIMO?

    4. 802.11n.

  4. Which 802.11 standard represents an improvement, and backwards compatibility, with 802.11b?

    5. 802.11g.

Part Two

  1. What was the original encryption utilized by 802.11?

    2. WEP, or Wired Equivalent Privacy.

  2. When were WEP crytographic vulnerabilities identified?

    3. They were identified in 2001.

  3. What type of encryption was created to improve on WEP but utilize the same hardware?

    4. WPA, or Wi-Fi Protected Access.

  4. What type of wireless encryption is based on the Advanced Encryption Standard (AES)?

    5. WPA2.

Part Three

  1. In wireless networking, what is an SSID?

    2. A Service Set Identifier, which is the name of the wireless network.

  2. Disabling SSID broadcast is an important security configuration.

    3. This is false, as security through obscurity is a poor method of security.

  3. What is the general security term used to describe the disabling of SSID broadcast?

    4. Security through obscurity.

  4. Can MAC addresses be spoofed?

    5. Yes, because they are not encrypted.

  5. What wireless networking standard supports speeds up to 600 megabits per second?

    6. 802.11n.