Computer Networks Exam 1

What is the internet standard MTU (maximum transmission unit)?

1,500 bytes

Which type of DNS record identifies an email server?

MX

Which 802.11 standard functions in both the 2.4GHz and 5GHz bands?

802.11ax and 802.11n

Which transmission characteristic is never fully achieved?

Bandwith

What is the first step in network troubleshooting?

Identify the problem

Which protocol replaces TKIP with WPA2?

CCMP

Which encryption benchmark ensured data is not modified after it's transmitted and before it's received?

Integrity

Which of the following devices are you likely to find in the MDF?

Routers, switches, KVM switch

Suppose you send data to the 255.255.255.255 IP address on an IPv4 network. To which devices are you transmitting?

All devices on your local network

Which carrier sense technology is used on wireless networks to reduce collisions?

CSMA/CA

What is the earliest twisted pair cabling standard that meets the minimum requirements for 10GBase-T transmissions at 100 meters?

Cat6a

What field in a TCP segment is used to determine if an arriving data unit exactly matches the data unit sent by the source?

Checksum

What type of device does a computer turn to when attempting to connect with a host with a known IP address on another computer?

Default Gateway

Which function of WPA/WPA2 security ensures data cannot be read in transit?

Encryption

A technician at your ISP has arrived to help you troubleshoot a weak WAN connection, to what location do you take them?

Entrance facility

When your computer first joins an IPv6 LAN, what is the prefix of the IPv6 address the computer first configures for itself?

FE80::/64

In the event of a fire, the most appropriate failure policy is what?

Fail-open policy

What type of fiber-optic cable problem is caused when pairing a 50 micron core cable with a 62.5 micron core cable?

Fiber type mismatch

In the client-server model, what is the primary secure protocol used for communication between a browser and web server?

HTTPS

Which two protocols manage neighbor discovery processes on IPv4 networks?

ICMP and ARP

Which encryption protocol does GRE use to increase the security of it's transmissions?

IPsec

Which of the following wireless transmission types require a clear LOS (line of sight) to function?

IR (Infrared)

What is the first step of inventory management?

List all components on the network

A transceiver was recently damaged by a lightning strike. How do you determine whether the ISP is responsible for replacing the device, or if your company must pay the bill?

Look at whether the device is located on the ISP's side of the demarc.

Which fiber connector contains two strands of fiber in each ferrule?

MT-RJ

What kind of crosstalk occurs between wire pairs near the source of the signal?

NEXT (Near-end Cross Talk)

At which layer does IP operate?

Network Layer (Layer 3)

What is the lowest layer of the OSI model at which wired and wireless transmissions share the same protocols?

Network layer, Layer 3

Which of the following applications could be used to run a website from a server?

Ngnix

Which part of the MAC address is unique to each manufacturer?

OUI (Organizational Unique Identifier)

What is one advantage offered by VDI over RDV and VNC?

Offers access to multiple OSs in VMs.

What cable is best suited for ultra-high speed connections between a router and switch on the same rack?

Passive twinaxial cable

What is considered a safe place to store a list of documented network passwords?

Password manager

You need to connect a new network printer to a nearby wall jack. What kind of cable should you use?

Patch cable

A network consists of five computers, all running Windows Professional. All computers are connected to a router, which is connected to a switch. Which logical networking model does the network use?

Peer-to-peer

Which DNS server offers the most current resolution to a DNS query?

Primary DNS server

Which of the following is an application layer protocol?

RDP (Remote Desktop Protocol)

As you're done troubleshooting a dead zone in your office, which measurement will help you determine the edges of the dead zone?

RSSI

If you're shopping for a rack switch, what component on the switch tells you it can be mounted to a rack?

Rack ears

Which remote file access protocol is an extension of SSH (Secure Shell)?

SFTP

What language can you use to pull records from a database?

SQL

Which two encryption protocols might be used to provide secure transmissions for email services?

SSL and TLS

What kind of multiplexing assigns slots to nodes according to priority and need?

STDM (Standard Time Division Multiplexing)

A network consists of seven computers and a network printer, all connected directly to a switch. Which network topology does this network use?

Star topology

Which protocol header would a layer 5 device read and process?

TCP

Which part of a toner and probe kit emits an audible tone when it detects electrical activity on a wire pair?

Tone locator

What device converts signals from a campus' analog phone equipment into IP data that can travel over the internet?

Voice gateway

Suppose you're creating patch cables to be used in a government office. What color wire goes in the first pin?

White/green

What type of diagram shows a graphical representation of a networks wired infrastructure?

Wiring Diagram

Which of the following wireless technologies does not use a 2.4GHz band?

Z-Wave

You decided to run a Nmap scan on your network. Which apps could you open to perform this task?

ZenMap, PowerShell, Command Prompt

You are getting duplicate IP address error on your PC and need to find what other device is using the address. What command shows which MAC address has that address?

arp -a

Which one of these commands have no parameters in Windows?

hostname

If you are connected to a network that uses DHCP, and you need to terminate your Windows workstation's DHCP lease, which command would you use?

ipconfig /release