Interested to Buy Any Domain ? << Click Here >> for more details...
What does a router change in a packet when it forwards a
packet to the next hop?
* A: Destination physical address
* B: Destination network address
* C: Destination network address and the destination
physical address
- 10 Answers
- 20404 Views
- Microland, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / jitendera kumar sinha
sudeep is correct option is A
here is the explanation
Let's say that we have Host A and Host D. Host A sends a
packet to Host D, which Host D is on a different network.
Host A applies both the logical address and logical device
address before sending the packet. The source network layer
address is also added to the packet, so the receiving device
can reply if it needs to. Then Host A adds it's own device
address (which in this example is 10.) Instead of adding the
device address of Host D, it uses the next router in the
path (which it's address is 20.) Now the packet is sent and
is received by the next router. Router B examines the
destination address and recognizes the address is addressed
to it. The router strips off the data link addresses and
examines the destination device of the network layer. It
recognizes the address to be on a different network. Since
Router C is the next router in the path, Router B sends the
packet to it. So Router B applies it's own device address
(20) and uses Router C device address as the destination
address (30) Router B sends the packet to Router C. Router C
sees that it's addressed to it. Router C strips off the data
link addresses and examines the destination device of the
network. It recognizes that the packet is sent to Host D.
Router C applies it's own device address and applies the
destination address of Host D (40) Router C sends the packet
to Host D. The data link addresses are removed. The original
source and destination addresses are contained in the packet
at the network layer.
hope this article help those people who marked it wrong
| Is This Answer Correct ? | 4 Yes | 0 No |
Answer / mr.shahin07
(10.0.0.1) (10.0.0.2)
S0 S0
(R1)------------------------(R2)
!E0/1 (0ACF:AAA1:000A) ! E0/1 (1ACF:BBA1:010A)
!IP - 172.16.1.100 ! IP - 172.17.1.100
! !
! !
! !
(Host A) (Host B)
E0 (ABC0:ABB1:00A0) E0 (CAA0:ABE1:110A)
IP - 172.16.1.1 IP - 172.17.1.1
Just assume this is a network & all interfaces having their
Layer 2 & Layer 3 addresses.
Now Host A want to send some data to Host B.
Now wat wud be the Layer 2 & 3 source & Destination address.
a) Packet leaving Host A.
Layer 3 Source add - 172.16.1.1
Layer 3 Destination add - 172.17.1.1
Layer 2 Source add - ABC0:ABB1:00A0 (E0 of Host A)
Layer 2 Destination add - 0ACF:AAA1:000A (E0/1 of R1)
b) Packet leaving Router R1 -
Layer 3 Source add - 172.16.1.1
Layer 3 Destination add - 172.17.1.1
Layer 2 Source add - 0ACF:AAA1:000A (E0/1 of R1)
Layer 2 Destination add - 1ACF:BBA1:010A (E0/1 of R2)
c) Packet leaving Router R2 -
Layer 3 Source add - 172.16.1.1
Layer 3 Destination add - 172.17.1.1
Layer 2 Source add - 1ACF:BBA1:010A (E0/1 of R2)
Layer 2 Destination add - CAA0:ABE1:110A (E0/1 of R2)
So every time DESTINATION PHYSICAL ADDRESS is changed.
Hi guys, i just share wat i know. Let me if i m wrong. Your
feedback is important for me.
With Thanx & Regards
Shahin Ahmed
| Is This Answer Correct ? | 5 Yes | 1 No |
Answer / aurel
Shahin 07
You make it clear and easy to get. Many thanks !
| Is This Answer Correct ? | 2 Yes | 0 No |
Answer / jitendera kumar sinha
ha ha thanks shain for supporting me and providing the scenario based explanation people don't like to read theory so this article help them more.i mark it as excellent
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / gyan
TTL will also be decremented by 1 on each router before forwarding.
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / jitendera kumar sinha
but sahin if u make your answer with three router (R1 R2 and R3)and host off R1 want to send the data to R3 through R2 then it will easy to understandble.meanwhile it is excellent
| Is This Answer Correct ? | 0 Yes | 0 No |
Which of the following is used to manage and monitor the network? A.) SNMP B.) HTTP C.) IP D.) FTP
Given the global configuration commands: 'banner motd #' 'Hello #' When would the message be displayed? A.) The message of the day banner shows up before login. B.) The message of the day banner shows up during logoff. C.) These commands are not the right syntax for MOTD. D.) Message of the day banners are displayed upon entering global config mode. E.) Message of the day banners are not possible. F.) The message of the day would be, 'Hello #'
Which can be logged by IPX extended access lists? A.) source address B.) protocol C.) source socket D.) access list number E.) destination socket F.) destination address
Identify the mode reflected by the following prompt 'Router'? A.) Setup B.) RXBoot C.) Boot mode D.) Privileged exec mode
What is default time of hello packets in ospf?
Identify 3 features of IGRP? A.) Composite metric B.) New horizon C.) Flash updates D.) 60 periodic updates E.) Poison reverse
Which three of the following are true statements about connection-oriented sessions? A.) The segments delivered are acknowledged back to the sender upon their reception B.) Any segments not acknowledged are retransmitted by the receiver C.) A manageable data flow is maintained in order to avoid congestion, overloading and loss of any data D.) Segments are sequenced back into their proper order upon arrival at their destination
Which of the following protocols are used for logical network addressing? A.) IP B.) TCP C.) ARP D.) ICMP E.) RARP F.) BootP
Hello every one. Please can any one explain me the difference b/w Cisco Switch/ws-c3560-24ps-s and Switch/ws- c3560-24ts-s. what is does PS & TS Stands for. Waiting for your passtive reply. Wish You all the best
what is bgp i have ansered all of them except mpls while i am working on it but i donot have threotical concepts on it the told me that they are keeping me on hold let try urs knowledge all the best
What does 'P' mean when running a Trace? A.) Good route B.) Protocol unreachable C.) Source Quench D.) Destination unreachable
Identify the statement which connects access-list 101 inbound to interface e0? A.) Router(config-if)# ip access-group 101 in B.) Router(config-if)# ip access-group 101 C.) Router(config)# ip access-group 101 e0 in D.) Router(config)# ip access-group 101 e0 in
CCNA 
