New ICND1v3 Questions

Note (14th-Dec-2018): These new questions were gathered from our candidates so please learn them well before taking the ICND1 exam:

Question 1

Syslog – what does not belong?

A. host name
B. severity
C. timestamp
D. message

 

Answer: A

Question 2

What does a switch use for communication between VLANs?

A. STP
B. CDP
C. VTP
D. Etherchannel

 

Answer: C

Question 3

What is the maximum size of an Ethernet frame that uses 802.1Q tagging?

A. 1514 bytes
B. 128 bytes
C. 68 bytes
D. 1522 bytes

 

Answer: D

Question 4

When configuring a default gateway, should it be ip route 0.0.0.0…. or serial 0/0 0.0.0.0…… – dont know answer

Question 5

Which option does the route 0.0.0.0/0 represent?

A. Route with the lowest administrative distance
B. Gateway of last resort
C. Null route
D. Empty routing table

 

Answer: B

Explanation

In this question only the “Gateway of last resort” answer is suitable. A Gateway of Last Resort or Default gateway is a route used by the router when no other known route exists to transmit the IP packet. Known routes are present in the routing table. Hence, any route not known by the routing table is forwarded to the default route.

In fact this question is a bit unclear. Maybe it implies “creating a static route to network 0.0.0.0 0.0.0.0 is another way to set the gateway of last resort on a router.”

Reference: https://www.cisco.com/c/en/us/support/docs/ip/routing-information-protocol-rip/16448-default.html

Question 6

What is the purpose of a standard access list?

A. to filter traffic based on destination address
B. to deny traffic
C. to filter traffic based on source address

Answer: C

Question 7

If you are in VLAN 10 and it gets a packet from VLAN 2 with 802.1q enabled, what does it do with the packet?

A. Drops the packet
B. forwards it to VLAN 2
C. configures the port to handle traffic from VLAN 2
D. adds it to the VLAN database

Answer: A

Question 8

Drag drop question about cable types

Answer:

Coaxial <-> TV connection
Twisted <-> 10/100/1000 base
Fiber <-> BASE-5 BX
USB <-> connects two computers
Crossed-over <-> devices of the same type

Question 9

Which forwarding technology stores destination addresses in the cache?

A. MPLS
B. Cisco express forwarding
C. Process switching
D. Fast switching

 

Answer: B

Question 10

Which type of network topology requires each network node to be connected to one another?

A. Ring
B. Star
C. Mesh
D. Bus

 

Answer: C

Question 11

A router receives identical prefixes from OSPF, EIGRP, RIP and the same route is configured statically. Which route does the router use to forward traffic?

A. Static route
B. RIP route
C. EIGRP route
D. OSPF route

 

Answer: A

Question 12

Which route is the most secured : connected route

Question 13

Which syslog severity level logs informational messages?

A. 2
B. 6
C. 4
D. 0

 

Answer: B

Question 14

Which option describes a standard role that a firewall plays in an enterprise network?

A. It can permit unauthorized packets to pass to less secure segments of the network
B. It can decide which packets can traverse from a less secure segment of the network to a more secure
C. It can forward packets based on rules that are predetermined by IEEE standards
D. It can deny all packets from entering an administrative domain.

 

Answer: B

Question 15

A question with the mac table on a switch with mac 1111:1111:1111 and port 0/1 and the question was asking : You received a packet with destination mac 1111:1111:1111 on port 0/1 , how does the switch will handle the frame.

Answer: The switch forwards the frame to port 0/1 only.

Question 16

What cable use in star topology? (Choose two)

A.10 base2
B.10 base5
C.100 base2
D.100base5
…

Answer: 10Base-T, 100Base-T and 1000Base-T

Question 17

What is the binary of the IPv6 multicast address

Answer: 11111111

Explanation

IPv6 multicast addresses are distinguished from unicast addresses by the value of the high-order octet of the addresses: a value of 0xFF (binary 11111111) identifies an address as a multicast address; any other value identifies an address as a unicast address

Question 18

What is the lowest AD (IS-IS, IBGP, EIGRP, RIPv2 or OSPF)?

Answer: EIGRP

Explanation

The Administrative Distances (AD) of popular routing protocols is shown below:

Note: For IS-IS, the AD is 115; Internal BGP (IBGP) is 200

Question 19

Assume all the routing protocol have the same length prefix, what would the router prefer?

A. OSPF
B. EIGRP
C. CONNECTED
D. BGP

 

Answer: C

Question 20

In which circumstances is static routing most useful?

A. On a stub network
B. On a large network that must share routes quickly between routers
C. On a network that experiences frequent link failures
D. On a network with frequent routing changes

 

Answers: A

Question 21

Which statement describes the dynamic route correctly?

A. more secure than static
B. high scaling for large network
C. easier to configure than static route
D. build for small network

 

Answer: B

Question 22

Which statement is correct when comparing dynamic route and static route?

A. static route is more secure

Question 23

What would the router use as metrics when having different routing protocol in the routing table

A. Prefix length

Question 24

Which of the following description is correct about DNS?

A. Host will sends a request to a DNS server…

Question 25

Which statement about standard access list is true?

A. They have an implicit permit statement at the end to allow all traffic
B. They can use either a wildcard mask or a subnet mask to identify host
C. They can be identified by a number from 1 to 99
D. They must be placed close to the source of traffic

 

Answer: C

Question 26

Which of the following item is used to establish telnet session by having the host name?

A. DNS lookup
B. Ping
C. Syslog
D. ARP

Answer: A

Question 27

Which of the following command can be use to access all the files in a system?

A. syslog
B. IFS
C. ping
D. NTP

Answer: B

Question 28

For which important purpose was IPv6 addressing developed?

A. To reduce the number of public IP addresses on the internet
B. To replace network address translation
C. To remove the need for classless inter-domain routing
D. To relieve the shortage of public IP addresses on the internet

 

Answer: D

Question 29

What does the 0.0.0.0/0 mean in a routing table?

A. wildcard
B. empty routing table
C. Null table
D. Gateway of last resort

Answer: should be default route

Question 30

A host is attempting to communicate with a server from an application layer. The connection has failed, what would be the first layer to start from the troubleshooting standpoint?

A. network
B. Application
C. physical
D. session

 

Answer: C

Question 31

[am4show have=’p2;’]The left describes the types of cables, while the right describes the purposes of the cables.
Drag the items on the left to the proper locations. (Not all items can be used.)

Answer:

+ switch access port to router: straight-through
+ switch to switch: crossover
+ PC COM to switch Console port: rollover[/am4show]

Explanation

To remember which type of cable you should use, follow these tips:

– To connect two serial interfaces of 2 routers we use serial cable
– To specify when we use crossover cable or straight-through cable, we should remember:
Group 1: Router, Host, Server
Group 2: Hub, Switch
One device in group 1 + One device in group 2: use straight-through cable
Two devices in the same group: use crossover cable

For example: we use straight-through cable to connect switch to router, switch to host, hub to host, hub to server… and we use crossover cable to connect switch to switch, switch to hub, router to router, host to host… )

Question 32

Which destination IP address can a host use to send one message to multiple devices across …?

A. 239.255.0.1
B. 172.20.1.0
C. 192.168.0.119
D. 127.0.0.1

 

Answer: A (multicast address)

Question 33

Which value is of primary importance when a router populates its routing table for unique routes?

A. Administrative distance
B. Prefix length
C. Network address
D. Metric

 

Answer: A

Explanation

Making a forwarding decision actually consists of three sets of processes: the routing protocols, the routing table, and the actual process which makes a forwarding decision and switches packets. The longest prefix match always wins among the routes actually installed in the routing table, while the routing protocol with the lowest administrative distance always wins when installing routes into the routing table.

Reference: http://www.cisco.com/c/en/us/support/docs/ip/enhanced-interior-gateway-routing-protocol-eigrp/8651-21.html

Question 34

Which IPv6 address type is a public address?

A. Global unicast
B. Multicast
C. Link local
D. Unique-local

 

Answer: A

Question 35

How is the MAC address table of a switch populated?

A. When the switch receives an Ethernet frame with a new destination MAC address, it installs the destination MAC address and the ingress switch port in the MAC address table
B. When the switch receives an Ethernet frame with a new source MAC address, it installs the source MAC address and the ingress switch port in the MAC address table
C. When the switch receives an Ethernet frame with a new destination MAC address, it installs the destination MAC address and the egress switch port in the MAC address table
D. When the switch receives an Ethernet frame in which the source and destination MAC address are new, it installs the destination MAC address and the ingress switch port in the MAC address table

 

Answer: B

Explanation

A switch only learns (populates) its MAC address table with source MAC addresses only.

Question 36

Which statement describes the effect of exec-timeout 30 command?

A. The router disconnects the user session if it is inactive for 30 minutes
B. The router maintains a user session indefinitely after it is active for 30 mins
C. The router disconnects a user session if it is inactive for 30 seconds
D. The router maintains a user session indefinitely after it is active for 30 seconds.

 

Answer: A

Explanation

The “exec-timeout” command is used to configure the inactive session timeout on the console port or the virtual terminal. The syntax of this command is:

exec-timeout minutes [seconds]

Therefore we need to use the “exec-timeout 30” command to set the user inactivity timer to 30 minutes. To set the user inactivity timer to 30 seconds we use the “exec-timeout 0 30”.

Question 37

Which statement is true about port-security violations is true?

A. When a violation occurs on a switch port in restrict mode, the switch port continues to accept traffic from unknown MAC address until the administrator manually disables it.
B. When a violation occurs on a switch port in protect mode, it sends a syslog notification message
C. A port In the err-disabled state must be re-enabled manually, if recovery is disabled
D. When a switch port is in protect mode, it allows traffic from unknown MAC address until it has learned the maximum allowable number of MAC addresses

 

Answer: C

Question 38

Which statement is true about static and dynamic routing is true?

A. Only static routes are shared between connected interfaces
B. Dynamic routing is more scalable than static routing
C. Only dynamic routes are secure
D. Static routing is easier to maintain in a large network than dynamic routing.

 

Answer: B

Question 39

Which metric or metrics does RIP use to determine the routing table metric for a route?

A. Bandwidth and delay
B. Hop count
C. Bandwidth and hop count
D. Bandwidth

 

Answer: B

Question 40

Which network configuration allows a switch to send traffic from multiple VLANS over a single link to a router that routes between the VLANs?

A. Port channel
B. Router-on-a-stick
C. Virtual trunking
D. Spanning-tree

 

Answer: B

Question 41

Which statement about native VLAN traffic over 802.1Q trunk is true?

A. It is discarded by STP
B. It is placed is a high-priority queue
C. It is tagged with a value of 1
D. It is untagged

 

Answer: D

Question 42

Which feature allows a device to use a switch port that is configured for half-duplex to access the network?

A. Split horizon
B. CSMA/CD
C. IGMP
D. Port security

 

Answer: B

Explanation

CSMA/CD stands for Carrier Sense Multiple Access with Collision Detection. In an Ethernet LAN, before transmitting, a computer first listens to the network media. If the media is idle, the computer sends its data. If the media is not idle (another station is talking), the computer must wait for some time.

When a station transmits, the signal is referred to as a carrier. Carrier Sense means that before a station can send data onto an Ethernet wire, it have to listen to see if another “carrier” (of another station) is present. If another station is talking, this station will wait until there is no carrier present.

Multiple Access means that stations can access the network at any time. It is opposed to Token-Ring network where a station must have the “token” so that it can send data.

In short, CSMA/CD is the technology used for half-duplex switch port to transmit. CSMA/CD is not necessary for full-duplex switch port.

Question 43

Refer to the exhibit.

<exhibit missing>

If switch-A receives a frame with destination MAC address 0000.0000.0001 on its Fa0/1 interface, how does it process the frame?

A. It forwards the frame back out of interface Fa0/1
B. It floods the frame to all interfaces except Fa0/1
C. It holds the packet until the MAC address timer expires and then drops the frame
D. It drops the frame immediately

 

Answer: maybe B

Explanation

As the exhibit is missing so we can only guess. But B is the most suitable answer in all cases. If the MAC address 0000.0000.0001 is new to the switch (this MAC have not existed in the MAC address table) then surely the answer is B.

Question 44

When a router makes a routing decision for a packet that is received from one network and destined to another, which portion of the packet does it replace?

A. Layer 4 protocol
B. Layer 3 IP address
C. Layer 2 frame header and trailer
D. Layer 5 session

 

Answer: C

Explanation

During the transmission of a packet from source to destination, only Layer 2 information is replaced in the path. Layer 3 information remains the same (except when NAT is used).

Question 45

Which protocol can identify connected devices within a mixed-vendor infrastructure?

A. Virtual terminal protocol
B. Network time protocol
C. Link level discovery protocol
D. Cisco discovery protocol

 

Answer: C

Question 46

Which interface configuration is used with a router-on-a-stick configuration?

A. VRF
B. Subinterfaces
C. PIM sparse mode
D. Passive-interface

 

Answer: B

Question 47

You have configured the host computers on a campus LAN to receive their DHCP addresses from the local router to be able to browse their corporate site. Which statement about the network environment is true?

A. Two host computers may be assigned manually on each host
B. The DNS server must be configured manually on each host
C. It supports a DNS server for use by DHCP clients
D. The domain name must be configured locally on each host computer

 

Answer: C

Explanation

DHCP supports configuring a domain name to assign to the DHCP clients. For example:

Router(config)#ip dhcp pool CLIENTS
Router(dhcp-config)#domain-name 9tut.com
…

Question 48

Where is private IPv4 addressing used?

A. On the endpoints of a VPN tunnel that traverses outside an administrator domain
B. At a remote site that connects over public infrastructure to a hub
C. Within an enterprise
D. Over the internet

 

Answer: C

Question 49

Which protocol allows VLANs to be dynamically configured between multiple switches?

A. IGMP
B. STP
C. VTP
D. 802.1Q

 

Answer: C

Question 50

Client A cannot reach client B by its hostname. Which reason for the problem is most likely true?

A. The connected router is using the default domain lookup configuration
B. The hostname for client B is missing from the connected router
C. A DNS server has been misconfigured
D. Telnet has been disabled on the connected router.

 

Answer: C

Question 51

Which first step must a client perform to connect to an internal host when the hostname is known, but the IP address is unknown?

A. The client sends the host name in a DNS reply to a DNS server, and the DNS server responds with the host IP address
B. The client exchanges IP address information with a DNS server on the same LAN
C. The client looks up the hostname in the ARP table to determine the IP address
D. The client sends the host name in a DNS request to a DNS server, and the DNS server responds with the host IP address.

 

Answer: D

Explanation

When a client knew about the hostname but not the IP address, it needs to resolve the hostname to the IP address by sending a DNS request to its DNS server.

Notice that the ARP table is responsible for resolving IP address to MAC address only. It has nothing to do with the hostname.

==================New Questions added on 9th-Dec-2017==================

Question 52

Which route option can be used to back-up in case of fail?

Answer: floating route

Question 53

Which of the following is true about TCP and UDP?

Answer: only TCP order the transmission packets

Question 54

If a switch received a frame while forwarding others, how frame would be handled?

A. It will interrupt the frames
B. The switch will put the frame in a queue
C. Will be forwarded at the same time with the current frame
D. The new frame will forward first

 

Answer: C

Question 55

Which of the following true about access point?

A. It used physically to connect network devices
B. It is used as a router
C. Provide full duplex communication
D. It is a layer 2 device used to extend the LAN coverage to wireless devices

 

Answer: D

Question 56

Which of the following used to identify immediate destination?

A. Administrative distance
B. Metric
C. Next hop
D. Destination network

 

Answer: C

Question 57

Which of the following options could be used on router to prevent reassign IP address statically?

A. Pool
B. Lease
C. Client ID
D. Exclude address

 

Answer: D

Question 58

A router with a default setting deployed, how will act if it received mistype command?

A. Disable DNS look up
B. Recognizing the command
C. Try to resolve the command to an IP address
D. Try to correct the command
E. Show error message

 

Answer: C

Question 59

Which symbol ping of the following is for unknown packet?

A. .
B. *
C. ?
D. U

 

Answer: C

Explanation

The table below lists the possible output characters from the ping facility:

Character	Description
!	Each exclamation point indicates receipt of a reply.
.	Each period indicates the network server timed out while waiting for a reply.
U	A destination unreachable error PDU was received.
Q	Source quench (destination too busy).
M	Could not fragment.
?	Unknown packet type.
&	Packet lifetime exceeded.

Reference: https://www.cisco.com/c/en/us/support/docs/ios-nx-os-software/ios-software-releases-121-mainline/12778-ping-traceroute.html

Question 60

Which cables could be used for star topology? (Choose two)

A. 10 Base T
B. 100 Base T
C. 10 Base 5
D. 10 Base 2

 

Answer: A B

Question 61

Which of the following is true about dynamic route?

A. Reduce CPU of the network
B. More secure than static
C. Complicate the maintenance
D. Allow fast convergence when fail happen

 

Answer: D

Question 62

What RIPv2 use to elect of route?

A. Hop count
B. Administrative distance
C. Bandwidth

 

Answer: A

Question 63

Which of the following are two local host characters?

A. 32/prefix
B. 255.255.255.0
C. The administrative distance is 0
D. Dynamically learned
E. ?

 

Answer: A C

Question 64

Which attributes change all the path way (Choose two)

A. MAC destination address
B. MAC destination address
C. IP Source address
D. IP Source address

 

Answer: A B

Question 65

Why a host uses DNS server?

A. DNS client request to server
B. To resolve IP to FQDN
C. To resolve FQDN to IP
D. Assign IP

 

Answer: C

FQDN (Fully Qualified Domain Name)
E. Verify connection

==================New Questions added on 9th-Aug-2018==================

Question 66

What time zone is set by default on the router?

A. GMT
B. UMT

 

Answer: A

Explanation

By default, the router uses UTC, also called Coordinated Universal Time. UTC, formerly known as Greenwich Mean Time (GMT), has become the worldwide standard for time and date.