Answer / jitendera sinha

what is loop it is difficult to explain without any diagram.
but i am trying my best to explain it without any diagram
ok
firstly understand that what is loop
loop is a cycle.
it is difficult to understand from that explanation.

now let there 3ree switch a , b ,c.which are connected with
each other.now for back up for that connection we provide
alternate path that is called redundancy(suppose that you
know)ok
as if a user want to communicate with another user in to the
network then multiple packet is generated.and these packet
travel through each path within the network.due to this a
loop is formed
diagarm
a---------b--------c
<----------------->
lower one is alternate path between a to c.now if a want to
communicate with c then packet travel through both path and
crated loop

now in some cases stp is enabled but loop also formed it is
due to

An STP loop is created when an STP blocking port in a
redundant topology erroneously transitions to the forwarding
state. This usually happens because one of the ports of a
physically redundant topology (not necessarily the STP
blocking port) no longer receives STP BPDUs. In its
operation, STP relies on continuous reception or
transmission of BPDUs based on the port role. The designated
port transmits BPDUs, and the non-designated port receives
BPDUs.

thanks i think this article may help you
with best regards
jitendera sinha

What key do you use to view the last command? A.) Left Arrow B.) Ctrl-P C.) Up Arrow D.) Right Arrow

2 Answers  

---

what is the difference between dynamic NAT and NAT overload ? and how it works ?

4 Answers  

---

What does protocol mean?

0 Answers  

---

Can anybody tell me how to configure a cisco router?

2 Answers  

---

What does the trace response !H mean? * A: Network unreachable * B: Not forwarded due to ACL restriction * C: Protocol unreachable * D: Port could not be reached

2 Answers  

---

PICT & JPEG are examples of what layer in the OSI seven layer model? A.) Transport B.) Presentation C.) Application D.) Datalink E.) Network F.) Session

1 Answers  

---

What is the name of algorithm of eigrp protocol?

0 Answers  

---

How the STP determinw that which Port should be Root Port, which port should be Designeted Port , Blocking Port and Forwarding Port in Layer 2 STP topology........ Hi friends Thanks for posting the answer of above given questions i agree with all of you that BPDU is the Protocol that are used to determine this is clear to me.. But I want to Know the Process like Why it Blocked the port Fa0/1 Insted of Fa0/2 waiting for Answer Posting .... Thanks in Advance

5 Answers  

---

How many reserve ports?

0 Answers  

---

Identify the command to configure DLCI 100 on an interface e0? A.) Router(config)# frame-relay local-dlci 100 B.) Router(config)# frame-relay local-dlci 100 int e0 C.) Router(config-if)# frame-relay local-dlci 100 D.) Router(config-if)# frame-relay local-dlci 100 int e0

1 Answers  

---

What is protocol data unit in ccna?

0 Answers  

---

What is the purpose of the DLCI? A.) Identifies the remote routers B.) Contained with a 802.2 frame for routing purposes C.) Used with PPP during authentication D.) Identifies the PVC in a Frame Relay network

1 Answers  

---