PPP vs HDLC and L3 switch vs Router

-
Difference between PPP and HDLC :
=================================
1 . Authentication :
PPP supports the authentication and HDLC does not support the authentication

2 . Fragmentation Handling :
PPP handles the fragmented packets in better way . Jitter can be controlled more effectively by PPP

3 . Compression Support :
PPP supports the compression and HDLC does not support the compression

4 . Standard :
PPP is OSI standard protocol and HDLC is cisco proprietary protocol

5 . Deployment :
PPP is used in async dial up networks . eg PPPoE , PPPoA . So it is used in LAN
HDLC is used in point to point serial links. It is used in WAN


Difference between L3 switch and Router :
=========================================
1 . Switching speed :
L3 Switch does the hardware switching using ASIC . So it is faster .
Router does the software switching using microprocessors and device drivers. So it is comparatively slower than switch in LAN

2 . Physical component Support :
L3 switch has only ethernet ports and supports only ethernet traffic .
Router has the interfaces of many carrier protocols such as ATM , Ethernet , POS . It needs to support encapsulation from one carrier to another carrier

3 . Deployment :
L3 switch is deployed in LAN . Router is deployed in WAN .

4 . Broadcast :
Router creates multiple collision and broadcast domains .
L3 Switch create one broadcast and multiple collision domain based on the configuration .



Note :
======
Please share your thoughts on the topic and make this blog as forum of technical topics . Please let me know the topics you want to know . It would help me to post the same here

Comments

Post a Comment

Popular posts from this blog

URL FILTERING IN FORTIGATE

-
Image
URL Filtering in PALO ALTO requires configuration of below things,  1 . Interface/Zone configuration  2 . Static route Configuration .  3 . URL Filtering Configuration  4 . Security Policy Configuration  Topology : Interface , Router Config: 1 . Configure the interface which is connected to linux vm in private network and mgmt interface config system interface     edit "port1"         set ip 10.10.9.11 255.255.255.0         set allowaccess ping https ssh http fgfm     next     edit "port2"         set ip 15.15.15.102 255.255.255.0         set allowaccess ping https ssh http     next end 2 . Configure the interface which is connected to internet config system interface     edit "port3"         set ip 10.48.110.206 255.255.255.0         set allowaccess ping https ssh http     next end 3 . Set default route pointing to internet facing interface and route for mgmt network config router static     edit 20         set dst 10.20.
Read more

URL FILTERING IN PALO ALTO FIREWALL

-
Image
URL Filtering in PALO ALTO requires configuration of below things,  1 . Interface/Zone configuration  2 . Static route Configuration .  3 . NAT Configuration  4 . URL Filtering Configuration  5 . Security Policy Configuration  Topology : Interface , Router Config: 1 . Configure the interface which is connected to linux vm in private network and mgmt interface config system interface     edit "port1"         set ip 10.10.9.11 255.255.255.0         set allowaccess ping https ssh http fgfm     next     edit "port2"         set ip 15.15.15.102 255.255.255.0         set allowaccess ping https ssh http     next     edit "port3"         set ip 10.48.110.206 255.255.255.0         set allowaccess ping https ssh http end 2 . Configure the interface which is connected to intenet config system interface     edit "port3"         set ip 10.48.110.206 255.255.255.0         set allowaccess ping https ssh http end 3 . Set default rou
Read more

Packet over SONET/SDH

-
Image
Packet Over SONET/SDH : Many of us use the POS interfaces in the routers . So here we will have one small technical summary about POS(packet over SONET/SDH) POS also known as PPP over SONET/SDH . This is scheme which uses PPP encapsulation to map IP datagrams into the SONET/SDH payload . Why SONET/SDH payload and PPP are used for enacapsulation : Since SONET/SDH is point to point circuit , PPP is well suited here . POS layers : There are three pos layers. They are 1 . Bottom layer : mapping into SONET/SDH 2 . Mid layer - Framing of PPP with HDLC . 3 . Top layer – IP encapsulation into PPP Here I rememember Sridhar G , my mentor in HCL . I created the stream for POS interface and traffic was not success . At that time , he told me to select the HDLC in Agilent RT. For Ethernet , We use some other encapsulation in RT. Please share that info if u know. Operation of POS is : When transmitting : IP -> PPP->FCS generation->Byte stuffing->scrambling-SONET/SDH framing When rec
Read more