Telnet Protocol
Telnet Protocol
Telnet Protocol
Network hub
Network hub is a node that broadcasts data to every computer or
Ethernet-based device connected to it. A hub is less sophisticated than a
switch, the latter of which can isolate data transmissions to specific devices.
Network hubs are best suited for small, simple local area network (LAN)
environments.
Hubs cannot filter data so data packets are sent to all connected
devices/computers and do not have intelligence to find out best path for data
packets.
Hubs are used on small networks where data transmission is not very high.
Bridge
Is a device used to connect multiple LANs together with a larger Local
Area Network (LAN).
The bridge is a physical or hardware device but operates at the OSI model's
data link layer and is also known as a layer of two switches
To Connects two or more different LANs that has a similar protocol
and provides communication between the devices (nodes) in them. By
joining multiple LANs, bridges help in multiplying the network capacity of a single
LAN
Data or information is not stored and sent in the form of packets.
Router
Router is also a network device which works in network layer.
data or information is stored and sent in the form of packets.
Router provides traffic control:
Security
Filtering
Redirecting information
Wireless
Device Hub Bridge Switch Router Access Repeater
Point
1 (Physical) ,2
Network 1 2 2 (Data) or 3 3 1 (Physical)
(Data) or 3
Layer (Physical) (Data) (Network) (Network) or 2 (Data)
(Network)
To connect a network of
personal computers
Allow to connect multiple device and port can be
Function together, they can be
manage, VLAN can create security also can apply
joined through a central
hub.
Data
Transmission Electrical signal or bits Frame (L2 Switch) Frame & Packet (L3 switch)
form
Used in (LAN,
LAN LAN
MAN, WAN)
Transmission
Half duplex Half/Full duplex
Mode
Broadcast Hub has one Broadcast Switch has one broadcast domain [unless VLAN
Domain Domain. implemented]
Collisions occur
Collisions commonly in setups No collisions occur in a full-duplex switch.
using hubs.
bands with higher frequencies so that the landline and the ADSL modem can be used at
the same time
At the central office, or telephone exchange, the line ends at the DSL
access multiplexer (DSLAM).
It is a cost-effective method for internet access at faster speeds
compared to a traditional dial-up connection.
CCNA certified professionals can make connections to remote sites via a wide area network (WAN),
mitigate basic network security threats, and understand fundamental networking concepts and
terminology.
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