Introduction to Networking Final Exam Review | Complete Solution

Introduction to Networking Final Exam Review

1. BYTE= group of 8 bits (word)
2. In a truth table – 1 & 0 equal False
3. In math, a parentheses ensures whatever operation is inside the parentheses is performed first
4. Node is any device connected to a network
5. Star topology – inherent weakness is a single point of failure
6. Documentation of ideas that all network users must agree to use is basic to every networking standard
7. TCP/IP is divided into layers:

1. To make it easier to understand how networks work
2. To make it easier to write protocols for networks
3. To make it easier to create network standards

1. http://www.example.com/page2 - http is the protocol
2. Presentation layer is responsible for encryption & compression
3. Encoding scheme is the way data is transmitted so it can be interpreted between nodes
4. Four wires: one pair or receiving & the other for transmitting cause full duplex to transmit & receive simultaneously
5. Maximum distance of UTP = 100 meters
6. 802.3 = Ethernet which defines features specific to Ethernet
7. Ethernet bit rate = speed of cables used
8. UTP cable uses 1 + 2 & 3 + 6 wire pairs to transmit & receive data
9. Site survey is used to identify where wireless devices such as Aps should be placed
10. Wi-Fi Alliance is a group of vendors who works to make the wireless LAN industry a success
11. Omnidirectional antennas broadcast in all directions
12. A link available 24x7x365 is a dedicated circuit
13. Routers belong in Layer 3
14. DEMARC is point where smart jack on customer side interfaces with smart jack on Telco side
15. SONET is purely digital technology that uses existing Telco copper media
16. Primary function of IP protocol = identifying individual hosts & groups of hosts (networks) using IP addresses
17. Routing protocols allow routers to learn how to route network packets more efficiently
18. 190.1.1.1 is a match to a Class B network
19. DHCP dynamically assigns IP addresses to devices on LAN
20. Subnetting 192.168.1.0 into six subnets require the “borrowing” of 3 bits
21. IP addresses are divided into two parts: the network identifier & the host identifier
22. Internet Edge is that part of the Internet between ISP & ISP customer
23. Firewall is typically found near the Internet Edge & offers security services for the network
24. Video & data transmission on the same piece of coaxial cable is accomplished by technique using different frequencies
25. User who travels 3 out of 4 weeks each month should get a 4G LTE mobile Internet connection
26. Private IP addresses are NOT routable across the Internet – Public IP addresses ARE
27. CIDR & NAT were developed because of IPv4 address exhaustion
28. Use of network prefixes that identify IP addresses as aggregates of network gateways are individual gateways is a defined feature of CIDR
29. 192.168.68.0 is a private network
30. Transport layer protocols provide a delivery service that recovers & resends lost data for Application layer protocols
31. Last assignable IP on the 10^th network for 172.16.3.5/subnet 255.255.255.192 is 172.16.2.126
32. When host has multiple application processes transmitting over network, applications are kept separate by giving each a different port number
33. HTTP for web servers = PORT 80
34. Well known port ranges =  numbers 0-1023
35. TCP segmentation is the process of that TCP software on a host uses to prepare data to be sent by an application by breaking it into smaller pieces that fit the size requirements of the devices outgoing interface
36. SEQ field in TCP packets is defined by IN-ORDER Delivery
37. If a TCP segment is NOT received by the destination- the source retransmits missing segments based on the acknowledgements received
38. UDP does NOT guarantee transmission of data
39. Source and destination ports do NOT have to be the same
40. Closed Electrical Circuit

A correctly wired cable that creates a closed electrical circuit between two nodes

1. Carl’s cubicle is 20ft from AP, Paul is 70ft and Mark is 150ft. Everyone should have wireless access but Mark’s will work slower.
2. PC1 connects to R1 as its default gateway. PC1 sends packet to PC2 (10.1.1.1). PC1 FIRST determines if the destination is on the same subnet as itself, then decides whether or not to send the packet to R1.
3. Depicts Internet Core