Network Fundamentals - Exam Prep

Network Fundamentals

Exam Prep

Multiple Choice

What is the primary purpose of the OSI model?

• It is a conceptual division of computer network architecture into seven logical layers.

• It is responsible for maintaining communication among different components on the web.

• It is a six-layer protocol that represents the Cisco IOS system.

• It is a seven-layer model used to differentiate among IP classes.

Multiple Choice

Which device is typically used to allow communication among two or more networks?

• Router

• RJ45 cable / Ethernet Cable

• Proxy firewall

• Network hub

• Switch

Multiple Choice

What is the main advantage of UDP?

• It is reliable.

• It is fast.

• It has a high overhead.

• It is secure.

Multiple Choice

What is a NIC (Network Interface Card) hardware address used for networking known as?

• IP address

• Network Interface Card

• MAC address

• Address Resolution Protocol

Multiple Choice

Which command would you use to display the status of all interfaces on a Cisco router?

• show status interface

• show interface complete

• show ip route

• show ip interface brief

Multiple Choice

While in User mode, which command would you use in the Cisco CLI to enter Privileged EXEC mode?

• admin

• enable

• disable

• privilege

Multiple Choice

How many bits are assigned to the network portion in the classful subnetting for a class A network?

• 8 bits

• 16 bits

• 32 bits

• 64 bits

Multiple Choice

What is the decimal value of binary value “1010”?

• 2

• 16

• 10

• None of these

Multiple Choice

In which layer of the OSI model does a router function?

• Layer 1 - Physical

• Layer 2 - Data Link

• Layer 3 - Network

• Layer 4 - Transport

Multiple Choice

When a new trunk link is configured on an IOS-based switch, which VLANs are allowed over the link? (By Default!!!)

• Only configured VLANs are allowed on the link.

• Only extended VLANs are allowed by default.

• No VLANs are allowed, you must configure each VLAN manually.

• By default, all VLANs are allowed on the trunk

Multiple Choice

What are the highest TCP and UDP port numbers?

• Those protocols do not use ports.

• The highest TCP port number can be 65,535, the highest UDP port number can be 16,384

• The highest TCP port number can be 65,535, the highest UDP port number can be 65,535.

• The highest TCP port number can be 16,384, the highest UDP port number can be 16,384.

Multiple Choice

What do the routing tables of a router keep track of?

• MAC addresses assignments.

• Routes used to forward data to their destinations.

• Port assignments to network devices.

• IP addresses of network devices.

Multiple Choice

What is Open Shortest Path First (OSPF) also known as?

• Link state protocol

• Error correction protocol

• Network information protocol

• All of these

Multiple Choice

Which of the following protocols is used by devices to advertise and gather information about neighboring devices?

• One-way route

• NTP

• CDP

• UDP

• TCP

Multiple Choice

Which of the following is true regarding RIPv2?

• It converges faster than RIPv1.

• It is a classful routing protocol, similar to RIPv1.

• It has a lower administrative distance than RIPv1.

• It supports CIDR and VLSM.

Multiple Choice

Where should you place a Standard ACL?

• As close to the destination as possible.

• At the midpoint between the destination and source.

• As close to the source as possible.

• None of these.

Multiple Choice

Which of the following is correct about VLSM?

• Subnets must be the same size.

• It has no requirements for subnets.

• It can have subnets of different sizes.

• None of these.

Multiple Choice

You want to improve network performance by increasing the bandwidth available to hosts and limiting the size of broadcast domains. Which of the following will achieve those goals?

• Hubs

• Switches

• Router-on-a-Stick

• Switches configured with VLANs

Multiple Choice

How many usable host addresses are there per subnet if you have the address 192.168.10.0 with the subnet mask 255.255.255.240?

• 4

• 8

• 14

• 16

Multiple Choice

Which command will add a static route to the router?

After going to "enable" and doing "configuration terminal".

• route 172.31.10.0 255.255.255.0 via 10.10.10.2

• route via 10.10.10.2 172.31.10.0 255.255.255.0

• ip route 172.31.10.0 255.255.255.0 10.10.10.2

• ip route add 172.31.10.0 255.255.255.0 10.10.10.2

Multiple Choice

How many layers are there in the TCP/IP model?

NOTE: Not the OSI Model!

• 3

• 4

• 6

• 7

Multiple Choice

Which of the following is used to verify the integrity of a Frame?

• Frame Verification Sequence

• Frame Check Sequence

• Frame Type

• It’s impossible to verify the integrity of a frame

Multiple Choice

An ARP request is sent as broadcast. How is an ARP reply sent?

• Multicast

• Universal

• Generated locally

• Unicast

Multiple Choice

Which command would you use to display the status of all interfaces on a Cisco router?

• show status interface

• show ip route

• show interface

• show ip interface brief

Multiple Choice

What is stored in a Cisco device MAC address table?

• Logical & physical addresses

• VLAN configuration

• Logical addresses

• Physical addresses

Multiple Choice

In-band management requires the network to be up and running. If there is a problem with the network, it would mean that you would need out of band management. Which one of the following is a method of out of band management for Cisco routers?

• USB Flash Drive

• Console Cable

• Firewire

• eSATA

Multiple Choice

When configuring port security, what is the default action in case of a violation?

• Restrict

• Shutdown

• Err-disable

• Protect

Multiple Choice

What do the routing tables of a router keep track of?

• MAC address assignments.

• IP addresses of network devices.

• Routes used to forward data to their destinations.

• Port assignments to network devices.

Multiple Choice

According to which parameter does a Standard ACL permit or deny network traffic?

• Source address

• Destination address

• Port address

• Source and destination addresses

Multiple Choice

An Extended ACL can filter data up to which layer?

Remember the OSI Model for this one 1-7!

• 2

• 3

• 4

• 7

Multiple Choice

Which of the following protocols allows multiple clients access to the internet using a single public address?

• PAT

• PPPoE

• OSPF

• Dynamic NAT

Multiple Choice

You want to improve network performance by increasing the bandwidth available to hosts and limiting the size of broadcast domains. Which of the following will achieve those goals?

• Hubs

• Switches configured with VLANs

• Router-on-a-Stick

• Switches

Multiple Select

Which of the following tasks does DHCP perform? (Select two answers)

• Performs host discovery for a DHCPDISCOVER message.

• Assigns and renews lease time for addresses.

• Provides simple management of layer 3 devices.

• Monitors IP performance using the DHCP server.

• Configures IP address parameters from a DHCP server to a host.

Multiple Choice

Which base does the hexadecimal number system use?

• Base 2

• Base 10

• Base 16

• Base 60

Multiple Choice

What is the purpose of a Native VLAN?

• To forward only TCP traffic

• To forward untagged traffic

• To forward urgent traffic

• None of these

Multiple Choice

Where should you place an Extended ACL?

• As close to the destination as possible.

• As close to the source as possible.

• At the midpoint between the destination and source.

• None of these.

Multiple Choice

How does a router choose the best route when multiple routing methods are configured?

• Administrative distance

• Routing source code

• Metric

• Passive-interface

Multiple Choice

On what layer of the OSI do collision domains exist?

• Physical

• Data Link

• Network

• Transport

Multiple Choice

How does a switch discover other devices?

• It sends a PRAP packet.

• It sends a DNS request.

• It sends a DHCP request.

• It sends an ARP request.

Multiple Choice

What is the main advantage of TCP?

• It has a high overhead.

• It is reliable.

• It is fast.

• It is encrypted.

Multiple Choice

A MAC address is assigned to a ____?

• Network Interface Card

• Keyboard

• Computer

• Mouse

Multiple Choice

How many bits are assigned to the network portion in the classful subnetting for a class C network?

• 16

• 24

• 32

• 64

Multiple Choice

What is the decimal value of binary value 00010000?

• 2

• 10

• 16

• None of these

Multiple Choice

On which layer of the OSI model does a switch function?

• Layer 1: Physical

• Layer 2: Data Link

• Layer 3: Network

• Layer 4: Transport

Multiple Choice

How do VLANs communicate with each other?

• They have to be routed just like any other LAN.

• VLANs on the same switch cannot communicate.

• VLANs broadcast an ARP request.

• VLANs use BGP to communicate.

Multiple Select

Extended ACLs can filter packets by ____? (Select three.)

• IP address

• Port

• Routing Protocol

• Protocol type

Multiple Choice

What is special about private IP addresses?

• They are routable over the internet.

• They are non-routable over the internet.

• They must match the MAC address.

• They are unique, as there can only be one in the entire world.

Multiple Choice

In dynamic routing, there is RIP, OSPF and ____?

• SYN/ACK Protocol

• NCC1701 Protocol

• EIGRP Protocol

• None of these

Multiple Choice

Which of the following protocols is used by devices to synchronize time?

• UDP

• TCP

• CDP

• NTP

Multiple Choice

RIP has an administrative distance of 120, and a directly connected device has the administrative distance of 0. What is the administrative distance of a static route?

• 0

• 1

• 90

• 110

Multiple Choice

What is at the end of every blocking ACL?

• There is an implicit deny.

• At the midpoint between the destination and source

• There is an implicit allow.

• None of these

Multiple Choice

If you were to split 10.0.0.0/8 evenly into two subnets, what would be the correct CIDR notation?

• 10.0.0.0/10 and 10.0.0.128/10

• 10.0.0.0/8 and 10.0.0.254/8

• 10.0.0.0/9 and 10.128.0.0/9

• None of these

Multiple Choice

You want to improve network performance by limiting the size of broadcast domains. What is one way this can be done?

• Hubs

• Subnetting into small networks

• Switches

• Router-on-a-stick

Multiple Choice

How many available addresses are there per subnet if you have the address 192.168.10.0 with the subnet mask 255.255.255.128?

• 4

• 8

• 16

• 128