Essentials of Networking Modules 7, 8, 9

To improve performance and relieve congestion, you are going to create specialized subnets for high volume segments. You want to support no more than six hosts on any of the new segments. Which class C subnet mask would you use?

NOT ANY OF THESE ANSWERS: /28 /32

Which of the following protocols can detect and correct link failures in milliseconds?

RSTP

Your device has a route to the 0.0.0.0/0 network in a routing table. What route is it, and when will it be used?

0.0.0.0/0 is a default route. The router uses it to route packets if it doesn't have a more specific route to the destination

Which IEEE standard determines how VLANs work on a network?

802.1Q

Which routing protocol does an edge router use to collect data to build its routing tables for paths across the Internet?

BGP

What is the key drawback of STP or per VLAN STP - PVST?

Slow convergence

What was the MTU size that required fragmentation in this project?

1473

In the space provided, enter the Upload speed reported by the desktop app. Enter only the numeric value.

17.28

An IPv4 address is presented in the dotted quad format consisting of four decimal values separated by dots. What is the highest decimal value assignable to one of the quads?

255

With a _________ Cloud, the hardware and software are maintained by the company that owns it.

Private

What kind of device can monitor a connection at the demarc but cannot interpret data?

Smartjack

What is the greatest number of bits you could borrow from the host portion of a class B subnet mask and still have at least 130 hosts per subnet?

WRONG: 10 bits

In the project you clicked the CLI tab to access the switch. What mode was the switch in when you accessed it?

Privileged EXEC wrong

What is the formula for determining the number of possible hosts on a network?

(2^h)-2=Z

Which switch interface did you configure?

FastEthernet0/0 wrong

What is the name of the switching feature that prevents frame dropping in case of congestion by pausing sending frames?

Flow control

When a router can't determine a path to a message's destination, where does it send the message?

Gateway of last resort

Which of these cellular technologies offers the fastest speeds?

LTE-A

What is the lowest layer of the OSI model at which LANs and WANs support the same protocols?

Layer 3

Which command places the switch in privileged EXEC mode?

enable

Lewis has been hired as an assistant to the head network administrator. He needs to understand the basic functioning of certain STP (Spanning Tree Protocol) features that will block BPDUs (Bridge Protocol Data Units) on any port serving network hosts. Which of the following will he use for such purposes?

A BPDU guard

Which DNS record needs to be configured for a network load balancing cluster?

An A record

At which layer in Software Defined Network (SDN) will you find a firewall?

Application Layer

In order to achieve the utmost fault tolerance, as a network administrator, you want to ensure that critical devices are all equipped with redundant NICs, routers, and processors, which are able to immediately assume the duties of an identical component in case one of the components fails. Which of the following will help you ensure these devices contain the necessary components you require?

Automatic failover

How would the decimal number 4 be represented as a binary value? Enter your answer in the space provided.

100

What do well-chosen subnets accomplish?

Network documentation is easier to manage.

What needs to be done with a newly added network adapter to be able to configure NIC teaming?

Configure the adapter with a static IP address in the correct range

What specifications define the standards for cable broadband?

DOCSIS

Which cloud characteristic allows a provider to limit or charge by the amount of bandwidth, processing power, storage space, or client connections available to customers?

Measured service

Which IP address will be used to connect a resource after Network Load balancing has been configured?

The Cluster's IP address

Which of the following traverses a significant distance and usually supports very high data throughput?

WAN

Which command places the switch in global configuration mode?

configure terminal

You need to configure a voice VLAN on your Cisco switch with the VLAN ID 10. Which of the following command will you use on the global configuration mode?

configure terminal vlan 10 name VOICE

Which command enables a port on a switch?

no shutdown

You are working as a network engineer at Krofter Securities. The organization uses Cisco's Linux OS in all of its workstations. The network administrator has asked you to use the route utility to delete some static routes used by the router. Which of the following commands will you use in this scenario?

route

Which one is the default VLAN? In the space provided, enter only the numeric value.

1

What is your switch's current firmware version? Enter you answer in the space provided.

1.0.1.4

How many VLANs are currently configured on the switch? In the space provided, enter only the numeric value.

10

The organization where you are currently working as a network administrator has a class A network address 10.0.0.0 with 40 subnets. You want to add another 60 new subnets to the network. You would like to still allow for the largest possible number of host IDs per subnet. Which of the following subnet masks will you choose in this scenario?

255.254.0.0

You as a network engineer want to create a subnet that supports 16 hosts. Which of the following subnet masks will you use in this scenario?

255.255.255.224

How many ports does your switch have? In the space provided, enter only the numeric value.

28

Which formulas can be used to calculate the magic number? Choose two.

2^h 256 - the interesting octet

Calculate the total number of hosts per subnet that you can derive from the network ID 192.168.1.0 255.255.255.224.

30

In the space provided, enter the Download speed reported by the desktop app. Enter only the numeric value.

300.84

In the space provided, enter the Download speed reported by the online bandwidth tester. Enter only the numeric value.

306

You are working on an IPv6 address 2608:FE10:1:AA:002:50FF:FE2B:E708. You want to create subnets within this IP address. Which of the following will you choose to alter when creating subnets for this address?

AA

Beevan works as a network analyzer for an ISP. The network manager has asked him to use a protocol for the routers that can scan beyond the home territory and can instruct a group of routers to prefer one route over other available routes. Analyze which of the following should be used in this scenario.

BGP

A virtual host containing 5 virtual servers represents a single point of failure. How can virtual services like email, file web and database servers be best managed?

Both of these

Which tier in the three-tiered network is responsible for routing traffic in and out of a network?

Core

You are working as a network engineer with an ISP. A query has come to you from a client who requires a guarantee of minimum uptime percentages if the service goes down. Which of the following will you choose in this scenario?

DIA

Which of the following devices contains ports to connect both to an incoming telephone line and to a computer or network connectivity device?

DSL modem

What is the difference between distance vector and link state routing protocol?

Distance vector routing protocol exchanges the whole routing table, while link state routing protocol exchanges information about all connected networks

Which of the following is an example of Software as a Service (SaaS)? [Choose all that apply]

Dropbox Microsoft 365

Which assignment technique requires a RADIUS server?

Dynamic VLAN assignment

When is dynamic routing protocol preferred over static routes?

Dynamic routing protocols are better in large environments where there are many networks and devices

Which of the following routes will have an Administrative distance of 90 in a routing table?

EIGRP routes

What is the functionality of multipathing? [Choose all that apply]

Ensure a resource is highly available Create different network routes to a resource on the network

When configuring a vNIC which choice is used to allow VMs on the same host to communicate but NOT with other network nodes?

Host-Only mode

When shopping for a new router, what does the MTBF tell you?

How long devices like this one will last on average until the next failure

What software allows you to define VMs and manage resource allocation and sharing among VMs on a host computer?

Hypervisor

In which type of cloud configuration is the customer responsible for maintaining the operating system and software?

Infrastructure as a Service (IaaS)

Which storage area network (SAN) connection type uses an Ethernet switch to send commands to the SAN devices?

Internet Small Computer Systems Interface (iSCSI)

You have a high speed environment in your network with speeds of up to 40 Gbps. Users in the network are experiencing slow performance issues on some applications. What do you need to enable on your equipment to improve the performance?

Jumbo frames

You, as a network engineer, have recently established a network connection for three separate department buildings in a university. One of the departments has complained that the signal strength it receives is not the same as the signal strength the other two buildings receive. Which of the following will you use in this scenario?

Line drivers

Which device can manage traffic to multiple servers in a cluster so all servers equally share the traffic?

Load balancer

What information does the switchport port-security command use to restrict access to a switch's interface?

MAC address

When configuring a vNIC to obtain IP addressing from its host, which choice is used?

NAT mode

With which network connection type does the VM obtain IP addressing information from its host?

NAT mode

Merging physical and virtual network architecture is known by what acronym?

NFV

Network segments that are more accessible to the Internet are known by what new term?

NOT ANY OF THESE ANSWERS: None of these DIZ

To ensure the high availability of a resource, what needs to be configured?

Network Load Balancing Multipathing NIC Teaming

Glenn, who is working as a network engineer, has been instructed to automate many tasks to work together in a complex and lengthy workflow. What is the term for this process?

Orchestration

Which cloud management technique executes a series of tasks in a workflow?

Orchestration

Which cloud service model gives software developers access to multiple platforms for testing code?

PaaS (Platform as a Service)

What is the advantage of elasticity when utilizing a cloud service provider? [Choose all that apply]

Resource allocation is scaled automatically Resources are deallocated when not used

What does an L3 device use to make decisions on where to forward a packet?

Routing table

The traffic that enters into a network is known as the ___________ traffic.

Southbound

Which of the following features of a network connection between a switch and server is not improved by link aggregation?

Speed

What kind of route is created when a network administrator configures a router to use a specific path between nodes?

Static route

You already have a running network in your organization, but because of the recent influx of network traffic and as a network engineer, you want to take a more organized approach in designing the network so that every device can function optimally. You have decided to add highly efficient multilayer switches to pass traffic in and out of a few backbone ports as quickly as possible. Which of the following layers of the network architecture will you use to bring in this change to your network?

The core layer

Which hexadecimal block in an IPv6 address is used for the Subnet ID?

The fourth one

Which of the following is not a good reason to segment a network?

To increase the number of networking devices on a network

Which type of switch connects all devices in a rack to the rest of the network?

ToR switch

Globcom is a call center operating in California. It has hired you as a network administrator to set up a voice VLAN to ensure the quality of voice transmissions. Which of the following will not be of immediate priority while setting up the VLAN connection?

Untagged frames

As a network administrator, a client has approached you to set up the network for MKV, a software company. The company requires sufficient amounts of data for both uploading and downloading purposes; however, it prefers a connection that has better download speed. Which of the following DSL varieties do you think is best suited for such a requirement?

VDSL

What virtual, logically defined device operates primarily at the data link layer to pass frames between nodes?

Virtual Switch

When a router connects to a switch that supports multiple VLANs, it is sometimes called _____.

a router-on-a-stick

In the space provided, enter the Upload speed reported by the online bandwidth tester. Enter only the numeric value.

12

What is the standard MTU size for Ethernet II PDUs without fragmentation?

1500

How many tiers are there in the spine and leaf network architecture?

2

A routing protocol's reliability and priority are rated by what measurement?

AD

As a developer, you need frequent access to multiple platforms during the development process. Rather than purchasing and maintaining a separate device for each platform, you have decided to avail the cloud service option. You are looking to build and test the applications within these virtual, online environments, which are tailored to the specific needs of the project. The cloud service model should have servers that provide only the resources needed to run an application and also allow customers to run their code directly in the cloud without having to manage a server environment at all. Which of the following cloud service models do you think would be appropriate considering your requirements?

PaaS

Which of the following is a more intelligent version of an NIU (network interface unit)?

Smartjack

In the project, which command option prevents fragmentation of oversized packets?

WRONG:

Your first ping request was assigned a TTL value of 232. What happens to this value each time the PDU passes its next hop?

WRONG: Does not change

What is the error message when we allow an oversized MTU to fragment?

WRONG: Packet needs to be fragmented, but DF set

How many bits of a class A IP address are used for host information?

24 bits

Which OSI layer is responsible for directing data from one LAN to another?

Network layer

You want to improve the security in your network and enable MAC address filtering. Which of the following feature will you configure on the switch ports?

Port security

Analyze which of the following is true about a default VLAN.

Ports in default VLAN can be reassigned to other VLANs.

The Centre for Equity Studies is a not-for-profit organization in Staten Island, New York, working in the human rights sector. Currently, because of the pandemic, the employees work from home. They work in association with three other initiatives, all of them involved in the same sector. Hence, there are a lot of resources that are routinely shared among all of them but not with the general public. You have been assigned the task of selecting one cloud model, keeping in mind the working conditions and the requirements of the users. Which of the following would suit this organization the most?

A community cloud

Which choice is a good reason to segment a network?

All of these

In which of the following modes will a vNIC access a physical network using the host machine's NIC?

Bridged mode

When configuring a vNIC to access a physical network using the host machine's NIC, which choice is used?

Bridged mode

When choosing the location to create resources in the cloud, what is the best location for the resources? [Choose all that apply]

Geographically closest Cloud Service Provider Datacenter Closest Regional Cloud Service Provider Datacenter

What method does a GSM network use to separate data on a channel?

TDMA

Which port mode on a switch enables that port to manage traffic for multiple VLANs?

Trunk

James has been appointed as the service manager in one of the outlets for Grason Communication, which sells switches and routers. A client approaches James with a query from a network provider who is requesting for an alternative router that is less expensive and will work within layer 5 and layer 7 in the OSI (open systems interconnection) model. Analyze which of the following options James should present to his client in this scenario.

Layer 4 switches