ICND1v3 New Questions - Things I know

Question 1

Syslog – what does not belong?

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

Answer 1

A

Question 2

What does a switch use for communication between VLANs?

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

Answer 2

C

Question 3

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 3

B

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 4

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 4

A

Question 5

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

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

Answer 5

C

Question 6

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

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

Answer 6

C

Question 7

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

Answer 7

A

Question 8

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 8

C

Question 9

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 9

A

Question 10

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 10

D

Question 11

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 11

B

Explanation

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

Question 12

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 12

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 13

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 13

B

Question 14

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 14

B

Question 15

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 15

B

Question 16

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 16

B

Question 17

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 17

C

Question 18

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

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

Answer 18

B

Question 19

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 19

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 20

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 20

C

Question 21

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

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

Answer 21

C

Question 22

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 22

C

Question 23

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 23

D