0. Define Network?
Communication, Resource sharing and Media (When multiple host share their resources with each other OR when multiple devices connect with each other for resource sharing )
Communication, Resource sharing and Media (When multiple host share their resources with each other OR when multiple devices connect with each other for resource sharing )
1.
Types of communication in IPv4?
Unicast, Multicast and Broad cast
Unicast, Multicast and Broad cast
2.
Types of communication in IPv6
?
Unicast, Multicast and Anycast
Unicast, Multicast and Anycast
3.
Types of Resource Sharing?
Intranet , Extranet and Internet .
Intranet , Extranet and Internet .
4.
What is Collision?
When signal hits each other, collision accord.
When signal hits each other, collision accord.
5.
Which Type of Transmission Bus Topology
Support?
Half Duplex
Half Duplex
6.
What is the difference between half duplex and
full duplex?
In half duplex, sender should b one. In full duplex, sender can be multiple.
In half duplex, sender should b one. In full duplex, sender can be multiple.
7.
Which way of communication bus topology use?
Broadcast
Broadcast
8.
If there is only 2 Host in Bus Topology is
that possible collision accord?
Yes, because end terminal will not absorb signals. Signal will be bounce back and collision will accord.
Yes, because end terminal will not absorb signals. Signal will be bounce back and collision will accord.
9.
HUB in Star topology or Bus
Topology?
In star topology, but logically works like a bus topology.
In star topology, but logically works like a bus topology.
10. What is the difference between bus topology
and HUB?
Hub is Centralized device ( series ) .Bus topology is Decentralized device (in parallel)
Hub is Centralized device ( series ) .Bus topology is Decentralized device (in parallel)
11. Is hub intelligent device?
No; because it not use header
No; because it not use header
12. Which protocol switch use for filling its
MAC-Table ?
ARP – Address Resolution Protocol
ARP – Address Resolution Protocol
13. What is CAM ?
Content Address Memory. its another name of MAC address table.
Content Address Memory. its another name of MAC address table.
14. Which type for communication switch do?
In case of any new event switch do broadcast, after that always do Unicast.
In case of any new event switch do broadcast, after that always do Unicast.
15. If line down and protocol also down; in this
case which layer move problem?
Physical Layer – Layer 1
Physical Layer – Layer 1
16. If line up, but protocol down which layer
should be troubleshot?
Data link problem – Layer 2
Data link problem – Layer 2
17. On
which base switches take decisions?
Mac Address
Mac Address
18. How ARP brings MAC address for switch?
Through Broadcast
Through Broadcast
19. How many collision domains are in switch?
Equal number of ports
Equal number of ports
20. How many broadcast domains are in Switch ?
One
21. What is OSI?
Open System Interconnection.
Open System Interconnection.
22. What is the default size of Frame ?
1518 bytes
1518 bytes
23. Which layer are called upper layer?
a ) Application Layer - 7
b) Presentation Layer – 6
c ) Session Layer – 5
a ) Application Layer - 7
b) Presentation Layer – 6
c ) Session Layer – 5
24. How many reserve ports ?
0 – 1023
0 – 1023
25. Which decision called socket base?
IP plus port (IP on layer 3 and port on Layer 4 – In Encapsulation, socket base decision on Network Layer -Layer 3)
IP plus port (IP on layer 3 and port on Layer 4 – In Encapsulation, socket base decision on Network Layer -Layer 3)
26. How many types of Data?
Voice, video, text
Voice, video, text
27. What is segmentation and fragmentation?
28. To
divide data in pieces is called segmentation and divide segmentation in pieces
called Fragmentation.
29. Which layer called error detection layer ?
Data link layer
Data link layer
30. What is FCS?
Frame Check Sequence -
CRC (Cyclic Redundancy Check) algorithm runs in switch that called FCS (Frame Check Sequence)
Frame Check Sequence -
CRC (Cyclic Redundancy Check) algorithm runs in switch that called FCS (Frame Check Sequence)
31. What is
Encapsulation and De-encapsulation?
To send data called encapsulation and receive data called De-encapsulation.
To send data called encapsulation and receive data called De-encapsulation.
32. What is BIA ?
Burn in Address other name is
MAC address
33. What is Size of IPv4 MAC Address?
48 Bits
48 Bits
34. Why MAC address called Physical address?
Because it’s not changeable
Because it’s not changeable
35. Who controls MAC address uniqueness and how
IEEE (Institute of Electrical Electronics and Engineering) Controls its uniqueness.
They divide 48 bits MAC address in two parts. First 24 bits part called OUI (Organizational unique identifier) and other 24 bits are device code.
IEEE (Institute of Electrical Electronics and Engineering) Controls its uniqueness.
They divide 48 bits MAC address in two parts. First 24 bits part called OUI (Organizational unique identifier) and other 24 bits are device code.
36. How we can see MAC address from DOS Prompt?
ipconfig/all
ipconfig/all
37. Why IP address called logical address?
Private IP called logical address because they are change able.
Private IP called logical address because they are change able.
38. What is the size of IPV4?
32 bits
32 bits
39. What is
Syntax of IPV4
. DOT
. DOT
40. How many types of IPS?
Three Types of IP
1- Public
2- Private
3- Special IP
Three Types of IP
1- Public
2- Private
3- Special IP
41. What
are the ranges of private IPS?
A Class = 10.0.0.0 – 10.255.255.255
B Class = 172.16.0.0 – 172.31.255.255
C Class = 192.168.0.0 – 192.168.255.255
A Class = 10.0.0.0 – 10.255.255.255
B Class = 172.16.0.0 – 172.31.255.255
C Class = 192.168.0.0 – 192.168.255.255
42. When we use loop back IP?
For Self hardware test
For Self hardware test
43. When IP confliction accord in subnet which IP
assigned automatically and what it called?
169.254.x.x APIPA (Automatic Private Internet Protocol address)
169.254.x.x APIPA (Automatic Private Internet Protocol address)
44. What is the minimum and maximum request timer?
Minimum = 180 sec
Maximum = 300 Sec
Maximum = 300 Sec
45. Which
company mange IP’s?
IANA (Internet Assigned Number of Authority)
IANA (Internet Assigned Number of Authority)
46. Which classes are assignable?
A, B and C
A, B and C
47. How
many potions of IP?
Two portions of IP. Network and host
Two portions of IP. Network and host
48. Do we
subletting of IP?
NO, we do subletting of NID
NO, we do subletting of NID
49. What is subnetting ?
Subnetting is tool reduce the wastage of IP
Subnetting is tool reduce the wastage of IP
50. What is CIDR ?
Class Less Inter domain Routing Protocol – another name of Supernetting.
Class Less Inter domain Routing Protocol – another name of Supernetting.
51. What is difference between FLSM and VLSM?
In FLSM subnet mask of all subnets will b same. But in
VLSM it varies.
In FLSM subnet mask of all subnets will b same. But in
VLSM it varies.
52. What is the subnetmask of / 27 in network
based and host based ?
In network based 224 { 128+64+32}and in host based 248 (128+64+64+16+8)
In network based 224 { 128+64+32}and in host based 248 (128+64+64+16+8)
53. What will be the prefix length of 224 in VLSM
?
27 (carry 3 bits from host (128+64+32=224) and add in network ports (24+3=27) )
27 (carry 3 bits from host (128+64+32=224) and add in network ports (24+3=27) )
54. How
many valid IP will b in /21 in route Summarization?
1044
55. In which protocol you manually enable route
summarization ?
OSPF
OSPF
56. In which protocol supenetting is enable by
default?
RIPv2
and EIGRP
57. What is Routing?
57. What is Routing?
Routing is the process of finding a path on which data can pass
from source to destination. Routing is done by a device called routers, which
are network layer devices.
58. What is MAC address size of IPv6?
64 bits
59. Default Packet Size of IPv6?
8 Bytes = 16*8 =128 bit
8 Bytes = 16*8 =128 bit
60. How
many fillers we can put in one IP of IPv6?
ONE (:: called filler)
ONE (:: called filler)
61. Which mathematically form used inIPv6?
Hexadecimal
Hexadecimal
62. What is
quality of IPv6?
a)
Router processing will rapid because field size wills 8 bytes
(but in IPv4 it was 12 byres)
b)
No Fragmentation
c)
No Checksum
63. What we called 64 Bit Mac-address in IPV6?
EUI= Enhanced universal
identifier – 16 bits add in IPv6 so it’s called EUI
64. Which command we use for ping in IPv6?
Ping6 source IP -s Destination
IP
65. How
many types of router?
Two types
i)
Modular
ii)
Non-Modular
66. When we use Router?
For communication between
different networks
67. Which works router Do ?
1-
Path selection and
2-
Packet Switching {frame relay}
68. What cable called V.35 ?
Serial Connectivity cable
69. How
many types of Ethernet?
4 types
i)
Ethernet
ii)
Fast Ethernet
iii)
Gigabit
iv)
10 Giga.
70. Which cable called roll-over?
Console access able
71. Which cable we connect in DB-9 ?
Roll over calbe
72. How many ways to access router?
3 ways
i)
Telnet (IP)
ii)
AUX (Telephone)
iii)
Console (cable)
73. What is IOS?
Internet Operating system. Its
router’s operating system.
74. In which IOS version 182 people can access
router through telenet ?
Onward 12.2 version
75. Which mode called privilege mode?
Second mode
76. When we use interface mode?
For specific interface commands
77. On Which mode we give debug command?
Privilege mode / live view (2nd mode)
78. Which command we give on privilege mode for
coming back to user execution mode?
Disable
79. Which mode we can’t skip when we come back
from interface mode?
2nd mode we can’t skip
80.
What is protocol?
Set of rules
81.
What is difference
between RIP and RIPv2
Rip
Broadcast
No authentication
Support FLSM
Ripv2
Multicast
Authentication
Support VLSM
82.
Which protocols are link
states?
OSPF and IS- IS
83.
Which Dynamic Type draw
back is, if single link down, it removes its routing table.
Distance Vector
84.
What is matric?
Formula of path
selection
85. What is
name of OSPF Algo?
Dijkstra or SPF (shortest part
first)
86. What is default size of Hello packets in OSPF?
50 bytes
87. What is default time of hello packets in OSPF?
10 sec
88. How
many tables are in OSPF protocol?
Three
1-
Neighbor
2-
Topology
3-
Routing
89. When OSPF protocol advertise its routing
table?
When it discover neighbor with
the help of hello packets
90. Which
table find best path?
Routing table
91. Which updates called incremental updates?
Change based
92. What are partial updates?
Any change in network
93. After how long OSPF exchange its topology
table?
After 30 min
94. What is refresher?
Every 30 min of topology table
exchange time called refresher OR
Exchange time of topology table
in OSPF protocol called refresher
95. What s the formula for metric of OSPF?
10^8
96. On which bas OSPF take decision?
LINK COST
97. What is default cost of serial interface in
OSPF?
64
98. How many types of OSPF Configuration?
There are Two Types
A ) SINGLE AREA
b) MULTI AREA
99. What is hold down time formula of OSPF?
HELLO PACKETS*4=40SECONDS
100.
What is the default bandwidth size of T1
Routers?
1544BYTES
101.
If bandwidth will increase what will happen?
SERIAL COST WILL DECREASE
102.
What is the command for change
serial cost?
IP OSPF COST (which want to
set)
103.
When DR communicate with BDR which multicast
ip it use ?
224.0.0.6
104.
What is the draw back of OSPF protocol?
i)
Single Area
iii)
High Hardware Requirements
iv)
Troubleshooting
105.
Which protocol comes under Hybrid dynamic
type?
EIGRP (ENHANCED INTERIOR
GATEWAY ROUTING PROTOCOL)
106.
Which protocol works only on Cisco routers?
EIGRP (ENHANCED INTERIOR
GATEWAY ROUTING PROTOCOL)
107.
What is the size of Hello
Packets in EIGREP protocol?
50 BYTES
108.
How much hold down time of EIGREP protocol?
15 SECONDS
109.
Formula of Hold down time of EIGRP protocol?
HELLO PACKETS*5=15SECONDS
110.
After how long EIGRP protocol Advertise its
routing table?
5SECONDS
111.
Which multicast IP EIGRP protocol use?
224.0.0.10
112.
Which protocol called Rapid protocol?
EIGRP
113.
What is the name of Algorithm
of EIGRP protocol?
DUAL(DIFFUSING UPDATES
ALGORITHM)
114.
How many hop counts are by default and how
much you can increase in EIGRP protocol?
By default 100 counts, and
maximum 25
115.
How much internal and External AD of EIGRP
protocol?
Internal =90 and Externa =170
116.
What is the name of best path in EIGRP
protocol?
SUCCESSOR
117.
What is the second best path
name of EIGRP?
FEASIBLE SUCCESSOR
118.
After how long keep alive messages exchange in
EIGRP?
5 SECONDS
119.
Which type of updates EIGRP
protocol do?
INCREMENTAL UPDATES (CHANGE
BASE)
120.
What is the draw back of EIGRP protocol?
CONFIGURE ONLY ON CISCO ROUTERS
121.
What is the matric of EIGRP protocol?
i)
Bandwidth
ii)
Load
iii)Delay
iv)
Reliability
v)
MTU
vi)
Maximum Transmission Unit
122.
In EIGRP metric parameters
which 2 Options are enable by default?
i)
Bandwidth
ii) Delay
123.
Which protocol can do load balancing
on unequal cost also?
EIGRP
124.
1350 value in which type of
Access-list?
STANDARD ACCESS-LIST
125.
1900 value in which type of Access list?
STANDARD ACCESS-LIST
126.
2500 value in which type of Access list?
EXTENDED ACCESS-LIST
127.
What is the difference between named and
Extended ACL?
In named Access-list we can
edit and also give name
128.
When we use standard Access-List?
When there is no Destination
129.
When we use extended
Access-List?
When there is source and
Destination
130.
What is the default behavior of Access-List?
Deny
131.
On which interface we always Apply
Access-List?
Fast Ethernet
132.
Wild card mask always in odd value or even
ODD
133.
In stead of 0.0.0.0 wild card mask what u can
write after IP?
Host
134.
In which Access- list type you can’t do
editing?
Standard and Extended
135.
In port based Access-List which command u give
instead of IP?
TCP(TRANSMISSION CONTROL
PROTOCOL)
136.
What does EQ means?
EQUAL TO
137.
Which reserve port Number Talent use?
23
138.
Which reserve port NO HTTP use?
80
139.
How many types of NAT?
i)
Static
ii) NAT
iii) Dynamic NAT
v)
PAT (Port Address Translation)
140.
What is overlaod?
It’s another name of PAT (Port
Address Translation)
141.
Which 2 Protocols are in WAN
technology?
i)
HDLC ( High Level Data Link Control )
ii) PPP (Point to Point
Protocol)
142.
How many types of ends in WAN?
i)
DTE (Data Terminal Equipment
ii) DCE (Data Communication
Equipment)
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