Net Review
In this assignment, we were to watch videos by Professor Messer that discussed various topics such as Protocols and Addresses, Common Ports, Network Technologies, IPv4 and IPv6, Network Cabling and Connectors, Network Types, and Wireless Networking. Below are the assignment questions that we had to answer.
Question Set 1: 4.1 - Protocols and Addresses
- In a networking context, what is a protocol?
Protocols are a specific language that are used between systems with no changes in dialect or word form. it is a very structured language. - What is the major protocol used on the internet?
The major protocol used on the internet is TCP/IP - At what OSI/ISO layer does IP operate?
It operates on Layer 3 - Network Layer.
Question Set 1: 4.1 - Protocols and Addresses Part 2 of 3
- What three pieces of information do you need to configure TCP/IP?
You would need an IP address, subnet mask, and default gateway. - Is the IP address a single address?
No, it consists of both a network ID and a Host ID. - When was classfull addressing last used?
Classfull addressing was last used in 1993. - What are the three major classes of addresses?
The three major classes of addresses are Class A, B, and C.
Question Set 1: 4.1 - Protocols and Addresses Part 3 of 3
- What is DNS/ What does it do?
DNS is Domain Name System. It turns a name into an IP address. - What is DHCP? What does it do?
(DHCP) Dynamic Host Configuration Protocol automatically configures all TCP/IP components such as IP address, subnet mask, default gateway, DNS servers, NTP s servers. - Which proprietary Microsoft protocol was used in early versions of Microsoft Windows?
NetBEUI was used in the early versions of Microsoft Windows. - Which protocol is used to resolve a fully qualified domain name to an IP address?
DNS is used to resolve a fully qualified domain name to an IP address.
Question Set 2: 4.1 - Common Ports
- In a TCP/IP context, what is a port?
A window or opening on a server/device that allows for connection to enter to request a specific service. - What is a non-ephemeral port?
Non-ephemeral is a permanent port numbers that are usually on a server or service. - What is meant by the term "well known" port?
"Well known" is where everyone decides on the same numbering scheme and they all know the common port numbers. - Compare and contrast TCP and UDP ports.
TCP and UDP both use port ranges between 0-65535, however they are completely different services/protocols
Common Ports Part Two
- What port does the DNS service utilize?
DNS service utilizes UDP/53. - What does the HTTPS protocol utilize?
HTTPS protocol utilizes TCP/443. - What is the protocol SMTP and what port does it use?
Simple Mail Transfer Protocol is used for sending mail messages on port TCP/25.
Question Set 3: 4.1 - Network Technologies
- How does Professor Messer define a network?
He defines a network as how we connect all the different devices together and how they communicate. - What is a network Topology? And who makes Network Topology Standards?
A network topology is the arrangement of the various elements within a network. IEEE makes the Network Topology standards. - What is the most popular form of consumer networking?
The most popular form of consumer networking is wireless networking. - What is the term that describes a network that can communicate in both directions at the same time?
Full Duplex - What differentiates a LAN from a WAN?
A LAN is typically used to connect devices in a small area or office so they can communicate with all devices on the network. A WAN connects multiple LANs together through a third party (AT&T Internet).
Question Set 4: 4.1 - IPv4 and IPv6
- What is the most widely used protocol in the world?
IPv4 is the most widely used protocol in the world. - Compare and contrast the lengths of IPv4 and IPv6?
IPv4 has 32-bit address with over 4 billion addresses. IPv6 has a 128-bit address with more than enough addresses that we would not run out of addresses. - Is this a valid IPv4 address: "192.1.325.12"?
No, the third octet is greater than 255. - Is this a valid IPv6 address: "a::b::c"?
No
Question Set 5: 4.2 - Networking Cabling and Connectors
- What is the alliance of trade associations that makes network cabling standards?
The Electronic Industries Alliances (EIA) develops the cabling standards. - What is the Commercial Building Telecommunications Cabling Standards that we use for cabling?
ANSI/TIA/EIA-568 - What is the most common physical type of cabling?
The most common physical type of cabling is Twisted Pair Copper cabling. - What category of copper cable support 1200 Mbits Ethernet?
Cat 5 beacuse it supports 100 Mbits Ethernet. - What category of copper cable supports 10 Gbits Ethernet through 55 meters?
Cat 6 because it supports 10 Gbits Ethernet.
Part 2
- What is plenum rated cable?
Cable that is used in plenum because it does not burn as quickly as regular cable. - What type of cable did Ethernet originally use?
Coaxial Cables - What is the type of cable that is most suited for sending signals a long distance?
Fiber Optic Cables - If you were connecting machines within a data center, what type of fiber would you be most likely to use?
Muti-mode Fiber - If you were connecting two remote buildings, what type of fiber would you be most likely to use?
Single-mode Fiber - What type of jack would you use for Ethernet?
RJ-45 - What type of jack would a phone use?
RJ-11
Question Set 6: 4.3 - Network Types
- What high speed type of network runs over telephone lines?
Digital Subscriber Line (DSL). - What type of high speed network runs over coax cable?
Cable Modem - Of the popular types of home high speed networks utilizes non-terrestrial networks that typically have a high latency?
Satellite Networks
Part2
- What was Bluetooth originally designed to replace?
Bluetoothe was originally designed to replace slow speed wires. - What type of network would Bluetooth create?
Personal Area Network (PAN).
Question Set 7: 4.3 - Wireless Networking
- What is the IEEE family of standards for wireless networking?
802.11 - How do the different members of the 802.11 family differ?
They differ in speed, distance, channels, and frequencies. - Which 802.11 standard utilizes MIMO?
802.11n - Which 802.11 represents an improvement, and backwards compatibility, with 802.11b?
802.11g
Part2
- What was the original encryption utilized by 802.11?
Wired Equivalent Privacy (WEP) - When were WEP cryptographic vulnerabilities identified?
2001 - What type of encryption was created to improve on WEP but utilize the same hardware?
WiFi Protected Access (WPA) - What type of wireless encryption is based on the Advanced Encryption Standard (AES)?
WPA2
Part3
- In wireless networking, what is an SSID?
Service Set Identified, the name assigned to a wireless network - Disabling SSID broadcast is an important security configuration.
It can be helpful but doesn’t actually secure anything. - What is the general security term used to describe the disabling of SSID broadcast?
Security through obscurity - Can MAC addresses be spoofed?
Yes - What wireless networking standard supports speed up to 600 megabits per second?
802.11n
