protocol
UTP
twisted pair
Cat 5 etc
crosstalk
resistance
attenuation
interference
EMI
RJ-45 connector
patch cable
horizontal cabling
bulk cable
plenum
patch panel
STP
coaxial cable
optical fiber 
topology

half duplex
full duplex 
switch
MAC address table
microsegmentation
MAC address table
router 
routing table
routing protocols
default gateway
nearside/farside
hub
CSMA/CD
collision
NIC / NIA

LAN
collision domain
broadcast domain
internetwork
PDU
encapsulation
packet
datagram
segment
fragment
frame
type field
protocol field
TTL field
checksum

forwards
floods
broadcast
unicast
bit
byte
octet

Ethernet
802.3
100Base-TX
10Base-T
1000Base-T
bandwidth 

ipconfig
ping
arp
tracert
netstat
telnet
ftp

TCP/IP protocol stack
TCP
well-known ports
listener/ing
services file
connection-oriented
acknowledgement
reliable
ephemeral port
PID
UDP
connectionless
IP
ICMP
Ping
Echo request
Echo reply
ARP
DHCP
lease
DNS
name resolution/lookup/query
Telnet
FTP
HTTP   headers
SMTP
SSH
RIP
IP address class
IP network address
IP broadcast address
subnet mask
logical address
physical address
MAC address
OUI
unregistered address
localhost
loopback address 127.0.0.1
APIPA 169.154.*.*

host
end system
intermediate system
server
client

baseband
broadband

OSI model
OSI model 7 layers
peers
Physical
Data Link
Network
Transport 
Application

HTML
URL

Packet Tracer
Apache
Wireshark network protocol analyzer
NMAP port scanner

show running-config
show ip route
show mac-address-table dynamic
show ip iterfaces brief