Flashcards
chap5-networkingDevices-part1
Cards in this deck (37)
- 1DHCP 67, 68 DNS 53purposes of ports and protocols
- 2explain devices and apps or services at their appropriate OSI Layers7 layers
- 3properties of network trafficbroadcast domains
CSMA/CD
CSMA/CA
Collision domains
Broadcast
multicast
unicast - 4performance conceptstraffic shaping
- 5IP reservationsd
- 6functions of network servicesDNS services
DHCP services - 7appropriate placement of networking devices on a netwỏk and their installationhub
modems
wireless range extender
VoIP endpoint - 8explain purposes and use cases for advanced networking devicesmultilayer switch
load balancer
IDS/IPS
proxy server
VPN concentrator
NGFW/Layer 7 firewall
VoIP PBX
VoIP gateway
content filter - 9remote access methodmodem
- 10NICnetwork interface card
interface your PC to the network
provices physical, electrical, electronic connections to network media - 11which layer NIC is on2 because the info it uses for communication, MAC address, resides on
Data Link layer - 12which option to build NIC on?expansion card or built right into PC's motherboard.
today most NICs are built into the PC motherboard, providing 10, 100 n 1000 megabits per seconds (Mbps) - 13how is NIC todayhave 1 or 2 or more LEDs,
one is green - link light, indicating that an Ethernet connection has been established with the device on the other end of the cable, flickers when traffic is being passed back or forth
the other(s) usually indicates speed of connetion: 10, 100 or 1000 - 14what is the other led on NICactivity LED, flicker constantly, indicates the intermittent transmission and reception of frames arriving / leaving at the network
- 15hubdevice that connects all the segments of the network together in a star topology Ethernet network.
- 16which layer hub is onlayer 1
each device in the network connects directly to the hub through a single cable and is used to connect multiple devices without segmenting a network. - 17how is data being process in through hubany transmission received on 1 port will be sent out to all the other ports in the hub, so that the CSMA/CD o the transmitter can monitor for collisions.
- 18what is CSMA/CDCarrrier Sense Multiple Access with Collision Detection
- 19actually hubs arenothing but glorified repeaters that are incapable of recognizing frames and data structures (lack of intelligence)
a broadcast sent out by any device on hub will be propagated to all devices connected
but because of that reason, it will cause the most troublesome LAN so it's not recommended for today's uses - 20bridgenetwork device that connects two similar network segments together.
primary function is to keep traffic separated on either side of the bridge, breaking up collisions domains - 21what's special about bridge?traffic is allowed to pass through the bridge only if the transmission is intended for a station on the opposite side.
- 22what OSI layer bridge is on?since they work with MAC address, so they're on 2
- 23what is bridge based on?software-based, switch as a hardware-based, multiport bridge
hard-pressed to buy a bridge nowadays - 24switchconnect multiple segments of a network together much like hubs, but with three differences (significant ones)
- 25switch vs hubswitch recognizé frames and pays attention to the source and destination MAC address of the incoming frame as well as the port o which it was received
- 26routerff
- 27interface configurationsggg
- 28firewallnnfnf
- 29IDS/IPSintrusion detection systems
x
intrusion prevention systems - 30how IDS and IPS workIDS is considered network monitor mode and records and tells you about problems,
whereas IPS can work in real time to stop threats as they occur - 31difference between IDS and IPSIPS works inline to actively prevent and block intrusions that are detected based on the rules you set up, IPS can send an alarm, create correlation rules and remediation, drop malicious packets, provide malware protection and reset the connection of offending source hosts
- 32HIDShost-based IDS
software runs on one computer to detect abnormalities on that system alone by monitoring applications, system logs, and event logs not by directly monitoring network traffic
systems like these are typically implemented on servers because they're a bear to manage if spread across several client computers on a network.
if IDS database is on the local computer and its data becomes compromised by an attack, IDS data could be corrupted too - 33access point APsdddd
- 34DHCPDynamic Host Configuration Protocol is based on BOOTP protocol which uses well known port number
- 35DHCP : UDP 67 vs 68User Datagram Protocol
67: destination port of a server
68: used by client - 36DNS UDP port 53Amazon Route 53 (Route 53) is a scalable and highly available Domain Name System (DNS) service. Released on December 5, 2010 [1] , it is part of Amazon.com's cloud computing platform, Amazon Web Services (AWS). The name is a reference to TCP or UDP port 53, where DNS server requests are addressed
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- Flashcards on chap5-networkingDevices-part1, created by Ax H on 05/03/2019.
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