device responsible for forwarding data packets along networks
router
data link layer devices that enable multiple physical LAN segments to be interconnected
switch
routing takes place at what layer
3 - network
switching takes place at what layer
2- data link
what are the four basic components of a network
protocols
transmission media
network operating system - nos
shared resources
what is the first half of a mac address
the vendor id
what is the second half of a mac address
the unique identifier
what does Arp resolution do
resolves the mac address to IP
a big LAN may be segmented into smller ones through ____________?
switching
what are the two major types of networks
peer to peer
server based
each computer in a __________ network can share and use resources like printers and files
peer to peer
a ________ topology has all connections terminating into a centralized concentrator
star
a switch has all devices centrally connect to a device that will record its ______________ after the flooding stage
mac address
what are the two types of switching mechanism
store and forward
cut through
each switch port provides a dedicated full speed _________________ segment
ethernet
what is layer 7
Application
what is layer 6
presentation
what is layer 5
session
what is layer 4
transport
what is layer 3
network
what is layer 2
data link
what is layer 1
physical
which layer is responsible for identifying and establishing the availability of desired communication partners and verifying sufficient resources exist for communication
application
layer 7
HTTP (80), SMTP (25), and FTP (21) work at which layer
application
7
what is the common port number for HTTP
80
what is the common port number for SMTP
25
what is the common port number for FTP
21
what is the common port number for TELNET
23
what is the common port number for SSH
22
The port numbers in the range from 0 to 1023 are the __________ ports