Net Review

Question Set 1: 4.1 – Protocols and Addresses

1. In a networking context, what is a protocol?
2. A language that must be spoken to allow successful communication over a network.
3. What is the major protocol used on the Internet?
4. TCP/IP
5. At what OSI/ISO layer does IP operate?
6. Layer 3, Network
• From Protocols and Addresses part 2 of 3...
1. What three pieces of information do you need to configure TCP/IP?
2. Default gateway, Subnet Mask, IP address.
3. Is the IP address a single address?
4. No, it is comprised of a network address and a host address.
5. When was classfull addressing last used?
6. 1993
7. What are the three major classes of addresses?
8. Class A, B, and C
• Protocols and Addresses part 3 of 3...
1. What is DNS? What does it do?
2. Domain Name Service, to put it simply DNS takes a user entered URL and looks in its local DNS cache or out on the internet on a DNS server to lookup the url and return the IP address of the URL so that the browser can communicate with the server at the IP address.
3. What is DHCP? What does it do?
4. Dynamic Host Configuration Protocol, DHCP is a protocol that runs when a new computer is added to the network, it automatically enables the server to configure the computers network settings to allow it to successfully communicate on the network by assigning it the correct default gateway, subnet mask, and IP address.
5. Which proprietary Microsoft protocol was used in early versions of Microsoft Windows?
6. NetBEUI
7. Which protocol is used to resolve a fully qualified domain name to an IP address?
8. DNS
• Question Set 2: 4.1 – Common Ports
1. In a TCP/IP context, what is a port?
2. The address of the software on the computer where the packets need to be sent
3. What is a non-ephemeral port?
4. Permanent port numbers that are only used by specific protocols
5. What is meant by the term "well known" port?
6. Universally accepted port #’s for specific protocols, example: http over port 80
7. Compare and contrast TCP and UDP ports.
8. Both are protocol types, but are different protocols that use the same port # range. TCP ports establish a connection via 3 way handshake to confirm that the 2 computers are connected and transmitting correctly. UDP does not establish a connection and transmits traffic without the handshake.
• Common Ports Part Two
1. What port does the DNS service utilize?
2. UDP 53
3. What port does the HTTPS protocol utilize?
4. TCP 443
5. What is the protocol SMTP and what port does it use?
6. Simple Mail Transfer Protocol, used for sending email from a client to a server, TCP 25
• Question Set 3: 4.1 – Network Technologies
1. How does Professor Messer define a network?
2. A way to connect devices together
3. What is a network Topology? And who makes Network Topology Standards?
4. Network type, IEEE - Institute of Electrical and Electronic Engineers
5. What is the most popular form of consumer networking?
6. WLAN or WiFi
7. What is the term that describes a network that can communicate in both directions at the same time? Full Duplex
8. What differentiates a LAN from a WAN?
9. Geographic size and distribution of the network. The entire internet is a WAN, while a home network would be a LAN because it is much smaller.
   1. Question Set 4: 4.1 – IPv4 and IPv6
10. What is the most widely used protocol in the world?
11. IPv4
12. Compare and contrast the lengths of IPV4 and IPV6.
13. IPv4 uses a 32bit address space, IPv6 uses a 128 bit address space. The address space is exponential and not linear providing several orders of magnitude of additional addresses
14. Is this a valid IPv4 address: "192.1.325.12"?
15. No, no octet can surpass 254 in an IP address, or 255 in a network mask
16. Is this a valid IPv6 address: "a::b::c"?
17. Yes, leading zeros and all zero octets can be eliminated.
    1. Question Set 5: 4.2 – Network Cabling and Connectors
18. What is the alliance of trade associations that makes network cabling standards?
19. EIA - Electronics Industries Alliance
20. What is the Commercial Building Telecommunications Cabling Standard that we use for cabling? ANSI/TIA/EIA-568
21. What is the most common physical type of cabling?
22. UTP, Unshielded twisted pair
23. What category of copper cable support 100 Mbits Ethernet?
24. Cat5
25. What category of copper cable supports 10 Gbits Ethernet through 55 meters?
26. Cat6
• Part 2
1. What is plenum rated cable?
2. Cable that is approved by fire departments to be used in a buildings plenum or run through ventilation ducts
3. What type of cable did Ethernet originally use? Hint, same type of cable as used in cable TV.
4. Coaxial copper cable
5. What is the type of cable that is most suited for sending signals a long distance?
6. Optical Fiber.
7. If you were connecting machines within a data center, what type of fiber would you be most likely to use?
   1. Multi-mode
8. If you were connecting two remote buildings, what type of fiber would you be most likely to use?
   1. Single-mode
9. What type of jack would you use for Ethernet?
   1. RJ45
10. What type of jack would a phone use? RJ11
• Question Set 6: 4.3 – Network Types
1. What high speed type of network runs over telephone lines?
2. DSL
3. What type of high speed network runs over coax cable?
4. Cable
5. Of the popular types of home high speed networks utilizes non-terrestrial networks that typically have a high latency?
   1. Satellite
• Part2
1. What was Bluetooth originally designed to replace?
2. Wires
3. What type of network would Bluetooth create?
4. Personal Area Network - PAN
   1. Question Set 7: 4.3 – Wireless Networking
5. What is the IEEE family of standards for wireless networking?
6. 802.11
7. How do the different members of the 802.11 family differ?

Each standard has different speeds and functionality built into it, typically each standard

increases the speed and bandwidth of the previous.

1. Which 802.11 standard utilizes MIMO?
   1. 802.11n
2. Which 802.11 standard represents an improvement, and backwards compatibility, with 802.11b?
   1. 802.11g
• Part 2
1. What was the original encryption utilized by 802.11?
2. WEP
3. When were WEP cryptographic vulnerabilities identified?
4. 2001
5. What type of encryption was created to improve on WEP but utilize the same hardware?
6. WPA
7. What type of wireless encryption is based on the Advanced Encryption Standard (AES)?
8. WPA2
   1. Part 3
9. In wireless networking, what is an SSID?
10. Service Set Identifier, The name of the wireless network
11. Disabling SSID broadcast is an important security configuration.
12. False, there is no security through obscurity
13. What is the general security term used to describe the disabling of SSID broadcast?
14. Security through Obscurity
15. Can MAC addresses be spoofed?
16. Yes, quite easily
17. What wireless networking standard supports speeds up to 600 megabits per second?
18. 802.11n