Flashcards
Network Infrastructures
Flashcards do conjunto (66)
- 1What are local area networks (LANs)?Networks that are generally confined to a single building or a single area of a building
- share common resources such as servers, printers, workstations, etc. - 2What is a perimeter network (DMZ)?a network that holds devices that need to be seen by both the public and private security zones of the network
ex. web servers, email servers, proxy servers - 3What is a back-to-back configuration of a perimeter network?a firewall is positioned on both the sides of the perimeter network
- 4What is a three-leg perimeter network?the firewall is placed central, between the private, public, and perimeter network
- 5What kind of Ip adresses are most common in LANs?Private
- 6What are private IP adresses?IP addresses not routable over a public network like the inernet
- 7What are the different ranges of private IP addresses?10.0.0.0
192.168.0.0
172.16.0.0 - 172.31.0.0
127.0.0.0 - 8what is the perk of private IP addresses?They can be reused, which saves on the use of public IP addresses
- 9What is the private reserved IP address of a network card?127.0.0.1
- 10What is APIPA?Automatic Private IP Addressing
- used when a device cannot get an IP address from a DHCP server - 11What is the IP Address Range for APIPA?169.0.0.0
- 12What are wireless LANs?devices in a LAN connected to each other through a wireless access point, often called a wireless router
- 13what are the benefits of Wireless LANs compared to wired LAN's?they're more flexible
- 14what are the benefits of Wireless LANs compared to wired LAN's?Wireless LAN's can be a little slower, more susceptible to signal interference, a little less reliable for consistency and speed
- 15What are Wide Area Networks(WANs)?networks that cover multiple geographical areas and are usually a collection of local area networks
- 16What kind of lines are available to connect netwokrs in WANs?Leased Lines
Dial-up Lines
ISDN connections - 17What is a leased Line?A dedicated connection from one location to another
- 18What is a dial-up line?a phone line and a server which accepts dial-up connections
- 19Limitations to Dial-up connections?They're very very slow
- 20What are the connection speeds for Dial-up?top speed is 56 kbps,
usually 38kbps - 21What are the two kinds of Integrated Services Digital Network(ISDNS)?Basic Rate Interface (BRI)
Primary Rate Interfaces (PRI) - 22What are the connection speeds of Basic Rate Interfaces (BRI) ISDNS?two 64kbps channels for total of 128kbps
- 23What are the connection speeds of Primary Rate Interfaces(PRI) ISDNS?twenty three 64kbps channels for a total speed of 1.536 mbps
- 24What circuit line does Primary Rate Interfaces(PRI) ISDNS run on?T1 circuit line
- 25What is IPsec?Internet Protocol Security
- a suit of protocols used to authenticate and encrypt data packets over VPN - 26What does IPsec do?provide confidentiality and integrity of data to ensure data over VPN stays private
- 27What are 3 IP sec protocols?Security Association (SA)
Authentication Header (AH)
Encapsulating Security Protocol (ESP) - 28What does the IPsec Security Association protocol do?generates the authentication and encryption keys
- 29What does the IPsec Authentication Header protocol do?provide authentication and integrity of data but not data encryption
- 30What does the IPsec Encapsulation Security protocol do?provides authentication, integrity, and encryption of data
- 31What are the 4 Leased lines in order of connection speed from slowest to fastest?T1
E1
E3
T3 - 32What is the connection speeds for T1 lines?- twenty four 64kbps channels + 8kbps for overhead
- total of 1.544mbps - 33What kind of lines can a customer buy?dedicated or partial
- 34What is the connection speed for T3 line?672 64kbps channels
44.736 Mbps
28 T1 lines - 35What are the connection speed for E1 line?European T1 Line,
32 64kbps channels
2.048Mbps - 36What are the connection speed for E3 line?European T3 Line,
16 E1 lines
34.368 Mbps - 37What is a digital subscriber line (DSL)?a customer has a dedicated from the orgin to the telco office.
- 38What is true of Synchronous DSL?- Upload and download speeds are the same
- used in buisneses needing fast uploads
- more expensive than ADSL - 39What is true of Asynchronous DSL?- Most commonly used
- has different upload and download speeds
- download speeds are higher than upload speeds - 40What is true of cable modem?cable internet runs over a shared bandwidth, so speeds tend to be slower during peak hours, but are usually faster than DSL
- 41What is the highest speed for cellular network?5G
- 42What causes cellular speeds to vary?The proximity to the tower?
- 43What is true of satelite?Faster than dial-up, but issues with latency (the delay from a source to destination), not best for real time activity like gameing or video
- 44What are the IEE 802.11 standards?they define the protocols and specifications for wireless LANs
- 45How many frequencies does the main 802.11 standard have?two,
2.4GHz
5GHz - 46What is true of 5GHz frequencies?faster but shorter range
- 47What is true about the relationship between 2.4 and 5GHz frequencies?They are not compatible on the same wireless network, however, most wireless access points run on both frequencies
- 48Which 802.11 standard runs on both frequencies?802.11n
- 49What are all the 802.11 standards and what frequencies do they run on?802.11a (5GHz)
802.11b (2.4GHz)
802.11g (2.4GHz)
802.11n (both)
802.11ac (5GHz) - 50What are all the speeds for each 802.11 standards?802.11a (54Mbps)
802.11b (11Mbps)
802.11g (54Mbps)
802.11n (300Mbps - 600 on dual link)
802.11ac (up to 1300Mbps) - 51What are all the ranges for each 802.11 standards?802.11a (30meters/100ft)
802.11b (35meters/115ft)
802.11g (38meters/125ft)
802.11n (70meters/230ft)
802.11ac (27meters/90ft) - 52What is WEP, and how secure is it?Wired Equivalent Privacy
- an encryption for network security
- weak and easily cracked - 53What is WAP, and how secure is it?Wi-Fi Protected Access
- much stronger than WEP
-can sometimes be the greatest encryption available - 54What is WAP2, and how secure is it?- the current strongest form of network encryption
- this should be used whenever available - 55What is 802.11x?- option for securing network
- AKA port-based network access control - 56Where is port-based network access control (802.11x) used?both wireless and wired LANs
- 57What are the three components to port-based network access (802.11x)?the supplicant, Authenticator, Network
- 58What are the steps to port-based network access.- The remote client (supplicant) accesses a network remotely
- then the router (Authenticator) alerts an authenticator server such as a Radius server
- the client will enter credentials, the server will very credentials and allow client on Network - 59What are the two types of wireless infrastructures?ad hoc and Point-to-Point(P2P)
- two wireless networks connect directly to eachother - 60What is SSID?Service Set Identifier
- the name of the network - 61What is a negative with ad hoc?theres no security or encryption
- 62What is wireless bridging?- a wireless bridge that connects two segments, often wired, of a network
- 63What is another function of wireless bridging? What is a repeater?- a wireless bridge can serve as a repeater
- a repeater boosts signal strength - 64What is a wired repeater?a hub
- boosts signals - 65How should wireless access points be positioned?- centrally in a room
- above the ground
- away from microwaves, elevator shafts, and water tanks - 66What is the difference between logical and physical topologies?Physical- the physical appearance and setup of the network
Logical- how data flows through the network
Informações
- Descrição
- 12th grade Cyber (Networking GMetrix) FlashCards sobre Network Infrastructures, criado por Nevaeh Dickerson em 05-05-2025.
- Criado por
- Nevaeh Dickerson
- Visualizações
- 14
- Avaliação