Network +

quagss's version from 2018-07-24 00:12

Wireless standards

Question Answer
802.112.4 GHz, 1 to 2 Mbps
802.11b2.4 GHz, max 11 Mbps
802.11g2.4 GHz, max 54 Mbps
802.11a5 GHz, max 54 Mbps
802.11neither frequency, max 600 Mbps
802.11ac5 GHz, max 1.3 Gbps
Access method for wirelessCSMA/CA
Bob got anotherAir conditioner


Question Answer
Class A range1 to 126
Class B range128 to 191
Class C range192 to 223
Class D range224 to 239
Class E range240 to 255


Question Answer
Global Unicast AddressEquivalent of IPv4 pulbic address; routable
Link local addressEquivalent to APIPA on IPv4
Fe80:: private link-local address
Site-local addressSimilar to 192.168.. Site-local traffic stays local
PATEnables LAN nodes to communicate externally w/o revealing IP address
SNATStatically map an external address to one particular internal one
DNATport forwarding


Question Answer
ls List files in current directory
cd Change remote working directory
lcd Changes local working directory
put Upload 1 file to remote host
get Download 1 file from remote host
mput Upload multiple files to remote host
mget Download multiple files from remote host
binary Switch transfers to binary mode
ascii Switch transfers to ASCII mode (default)
arp -a Display entries in cache
arp -s Manually add permanent entry to cache
arp -d Delete entry from cache
Cisco router show MACsh int interface name

DNS records

Question Answer
AStore IPv4 address
AAAAStore IPv6 address
SOADNS zoning
SRVGeneralized service location record
CNAMEStore aliases for hosts in a domain
PTRPointer from IP address to canonical name

WAN technologies

Question Answer
ISDNslow, but can transmit all types of traffic
T-carriermost useful in creating point to point connections
ATMFixed switching cells that are 53 bytes long
X.25Packet-switching network over phone lines
Frame relayPacket-oriented, goes over fiber or copper
SONET/OCxFiber only w/ high speeds
PPPFlexible but insecure data link protocol
PPPoEMostly used with DSL services
Multilink PPPBasically bonded PPP. Popular w/ cloud
MPLSMultitude of technologies used, short-path labels are key
DMVPNCreates dynamic mesh vpn network automatically
SIP trunk streamlining media service w/ VoIP
Which OSI layer is responsible for establishing connections b/t devicesTransport
VTPproprietary Cisco protocol to reduce administration in the switched network
T1 speed1.544 Mbps
T3 speed44.736 Mbps
E1 speed2.048 Mbps
E3 speed34.368 Mbps
OC-3 speed155.52 Mbps
OC-1929.953 Gbps
Packet switchingMesh
2 n equalsX

Bits to remember

Question Answer
Sublayers of the Data layerMAC and LLC
distance-vector protocolsIGRP and RIP
Session layer examplesNetBIOS, NFS, SMB
Presentation layerfiles, text, and data
Application layer Defines processes that enable applications to use network services
TFTP UDP file transfer method for simple downloads
ICMP Works with the IP layer to provide error checking and reporting functionality
DHCP relayGo-between for DCHP client and server
IP helperForwarded broadcasts by default
EUI6464 bit, dashes instead of colons
A thru Fmac address letters
Link-state protocolsIS-IS and OSPF
4 types of IDS/IPSbehavior, signature, network, host
PoE +802.3at
Number of bluetooth channels79
Nodes have equal prioritiesCDMA
PRI23 channels
E1 is _________ times slower than E317
TX and RXCrossover
Forward proxyHides client identity, works on behalf of the client
Reverse proxyHides server identity, works on behalf of server
Max std. ethernet transmission1500
SNMP ports161-2 UDP
SIEM real-time analysis of security alerts from network hardware and applications
data transfer rate exclusive of protocol overhead informationGoodput
Default route for all traffic0.0.0.0/0
SevenSteps in CompTIA troubleshooting process
SIP ports5060-1
Z-Wave232 devices
TCP/IP layersApplication/transport/internet/network (ahi tuna in Newark)
Data compression, encryption, decryption take place at thePresentation layer
UDP 67DCHP + Bootstrap
RTP port + RTP control port5004-5
Media Gateway Control Protocol (MGCP) ports2427 & 2727


Question Answer
Wireless AP operates at _________ layerData
Switches operate at _________ layerData or network
Router operates at _________ layerNetwork
NIC operates at _________ layerData
IP operates at _________ layerNetwork
TCP operates at _________ layer Transport