Cyber Midterm Review

Which network address and subnet mask does APIPA use? (Select two.)

- 169.254.0.0 - 255.255.0.0

Your network has a network address of 172.17.0.0 with a subnet mask of 255.255.255.0. Which of the following are true concerning this network? (Select two.)

- 254 IP addresses can be assigned to host devices. - 172.17.0.255 is the network broadcast address.

Which of the following features does UDP provide? (Select two.)

- Connectionless datagram services - Low overhead

In the OSI model, which of the following functions are performed at the Presentation layer? (Select two.)

- Data encryption and compression - Data format specifications

Which of the following are true about a MAC address? (Select two.)

- It is typically represented by hexadecimal numbers. - It is a 48-bit address.

Which of the following hardware devices regenerate a signal out of all connected ports without examining the frame or packet contents? (Select two.)

- Repeater - Hub

You want a switch to have the ability to modify the media type the switch port supports. Which type of module might you use to make this possible?

- SFP - GBIC

Which of the following connectors usually require polishing as part of the assembly process? (Select two.)

- ST - SC

After you install a new DHCP server on your network, you need to verify that the network devices are receiving IP addressing via DHCP. You reboot a Windows 10 client system and, using the ipconfig /all command, receive the following information: Ethernet adapter Local Area Connection 1: Description . . . . . . . . . . . : Intel(R) Ethernet Connection Physical Address. . . . . . . . . : 02-00-4C-4F-3F-50 DHCP Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes Autoconfiguration IPv4 Address. . : 169.254.25.129 Subnet Mask . . . . . . . . . . . : 255.255.0.0 Default Gateway . . . . . . . . . : DNS Servers . . . . . . . . . . . : Which of the following statements are true? (Select two).

- The client system is unable to reach the DHCP server. - The client system is configured to use DHCP.

You are troubleshooting a network connectivity issue on a Unix system. You're able to connect to remote systems by using their IP address, but you're unable to connect using the hostname. You check the TCP/IP configuration and notice that a DNS server IP address is configured. You decide to run some manual resolution queries to ensure that the communication between the Unix system and the DNS server are working correctly. Which utilities can you use to do this? (Select two.)

- nslookup - dig

Which of the following can you append to the end of the dig command to run a query for all the records in the zone?

-axfr

A rack's height is measured in rack units (Us). How tall is a single rack unit?

1.75 inches tall

Which of the following uses metal clips placed over plastic slots to connect individual copper wires?

110 block

Which of the following ports does NTP run on?

123

You've recently installed a new Windows server. To ensure system time accuracy, you've loaded an application that synchronizes the hardware clock on the server with an external time source on the internet. Now you must configure your network firewall to allow time synchronization traffic through. Which of the following ports are you MOST LIKELY to open on the firewall?

123

Which port number is used by SNMP?

161

Which of the following IP address ranges is reserved for Automatic Private IP Addressing (APIPA)?

169.254.0.1 - 169.254.255.254

Which of the following is a valid APIPA address?

169.254.32.50

Consider the following output from a dig command run on a Linux system. ; <<>> DiG 8.2 <<>> westsim111.com ;;res options:init recurs defnam dnsrch ;;got answer: ;;->>HEADER<<-opcode:QUERY, status: NOERROR, id:4 ;;flags: qr rd ra; QUERY:1, ANSWER:1, AUTHORITY:2, ADDITIONAL:0 ;;QUERY SECTION: ;; westsim111.com, type = A, class = IN ;;ANSWER SECTION: westsim111.com. 7h33m IN A 76.141.43.129 ;;AUTHORITY SECTION: westsim111.com. 7h33m IN NS dns1.deriatct111.com. westsim111.com. 7h33m IN NS dns2.deriatct222.com. ;;Total query time: 78 msec ;;FROM: localhost.localdomain to SERVER:default -- 202.64.49.150 ;;WHEN: Tue Feb 16 23:21:24 2005 ;;MSG SIZE sent: 30 rcvd:103 What is the IP address of the DNS server that performed this name resolution?

202.64.49.150

You manage a network with two locations (Portland and Seattle). Both locations are connected to the internet. The computers in both locations are configured to use IPv6. You'd like to implement an IPv6 solution to meet the following requirements: - Hosts in each location should be able to use IPv6 to communicate with hosts in the other location through the IPv4 internet. - You want to use a site-to-site tunneling method instead of a host-to-host tunneling method. Which IPv6 solution should you use?

6to4 tunneling

Which of the following IPv6 addresses is equivalent to the IPv4 loopback address of 127.0.0.1?

::1

During network transmission, data is transferred to various routers, which forward the data to the appropriate network. If the source and destination network addresses reside on the same network, which protocol is used to determine the destination IP's MAC address?

ARP

Which protocol is used by a device to ensure that an APIPA address is not already in use on the network?

ARP

You need to replace a fiber optic cable that's connecting two switches together. You inspect the existing cable and determine that it uses LC connectors. You also notice that the cable's ferrule has a slight slant to it. Which polish grade should you use to replace the existing cable?

Angled Physical Contact polish

Match each networking function or device on the left with its associated OSI model layer on the right.

Application Layer → HTTP Presentation Layer → Encapsulation Session Layer → Session ID number Transport Layer → Port number Network Layer → Router Data Link Layer → Switch Physical Layer → Modem

You're working with an older 10Base2 Ethernet network. Which of the following connector types will you MOST LIKELY encounter?

BNC

Which of the following BEST describes the special MAC address that multicast traffic frames are sent to?

Begins with 01-00-5E and ends with a form of the IP multicast group address

Which of the following is a valid MAC address?

C0-34-FF-15-01-8E

You are making Ethernet drop cables using Cat5e cables and RJ45 connectors. You need to remove the plastic coating over the cable to expose the individual wires. Which tool should you use?

Cable stripper

Which of the following cable types often includes a solid plastic core that keeps the twisted pairs separated?

Cat 6

What is the purpose of a frame check sequence (FCS) footer?

Checksum error detection

You are the network administrator for a small consulting firm. The office network consists of 30 computers, one server, two network printers, and a switch. Due to security concerns, there is no wireless network available in the office. One of your users, Bob, travels to client sites and is generally not in the office. When Bob goes to client sites, he typically just connects to their wireless networks. When he's in the office, Bob connects his laptop to the network with an Ethernet cable. You need to make sure that Bob's laptop is setup so that when he plugs the Ethernet cable into his laptop, no further configuration is needed. Which of the following would be the BEST option to achieve this?

Configure an alternate IP configuration.

Which of the following tasks is associated with the Session layer?

Connection establishment

What is the basic purpose of the OSI Physical layer?

Coordinate rules for sending and receiving electrical signals.

You have a TCP/IP network with 50 hosts. There have been inconsistent communication problems between these hosts. You run a protocol analyzer and discover that two of them have the same IP address assigned. Which protocol can you implement on your network to help prevent problems such as this?

DHCP

You have a network with 50 workstations. You want to automatically configure the workstations with the IP address, subnet mask, and default gateway values. Which device should you use?

DHCP server

You are a network technician for a small consulting firm. Many users have reported issues with accessing the network. After some initial troubleshooting, you discover that devices are not receiving their IP configurations. You look into the issue and discover that the network is being targeted by a denial-of-service attack. Which of the following is your network MOST likely experiencing?

DHCP starvation attack

You want to implement a protocol on your network that allows computers to find a host's IP address from a logical name. Which protocol should you implement?

DNS

You need to enable hosts on your network to find the IP address of logical names, such as srv1.myserver.com. Which device should you use?

DNS server

Which of the following describes the point where the service provider's responsibility to install and maintain wiring and equipment ends and the customer's begins?

Demarc

You have a cable internet connection at home. The installer had connected the router near the outside wall of your house with RG6 cable. You move the cable router a distance of 50 meters using RG8 cables and special connector adapters. Which condition are you MOST LIKELY to experience?

Echo

You've just signed up for a broadband home internet service that uses coaxial cabling. Which connector type will you MOST LIKELY use?

F-type

Which of the following IPv6 addresses is used by a host to contact a DHCP server?

FF02::1:2

You are the network administrator for a small organization. Recently, you contracted with an ISP to connect your organization's network to the internet. Since doing so, it has come to your attention that an intruder has invaded your network from the internet on three separate occasions. Which type of network hardware should you implement to prevent this from happening again?

Firewall

Which of the following creates a visual representation of physical components along with a clearly defined set of principles and procedures?

Floor plan

You are the network administrator for a small consulting firm. The firm has recently rolled out a new intranet site, and you are responsible for configuring the DNS. You are able to connect to the intranet site by using the IP address, but you cannot connect when you use the hostname. Which of the following do you need to configure so that the site can be accessed with the hostname?

Forward lookup zone

You need to design an IPv6 addressing scheme for your network. The following are key requirements for your design: - Infrastructure hosts, such as routers and servers, are assigned static interface IDs. However, workstations, notebooks, tablets, and phones are assigned interface IDs dynamically. - Internet access must be available to all hosts through an ISP. - Site-to-site WAN connections are created using leased lines. Which type of IPv6 addressing is most appropriate for hosts on this network?

Global unicast addressing

Which organization is responsible for allocating public IP addresses?

IANA

Which of the following protocols allows hosts to exchange messages to indicate problems with packet delivery?

ICMP

Which protocol does an IP host use to inform a router that it wants to receive specific multicast frames?

IGMP

You recently created a new network segment for the Development department. Because the hosts are now on a different network segment, they can no longer contact the DHCP server. Both network segments are connected via a Cisco router. Which of the following would be the BEST action to take to fix the problem?

Implement an IP helper address on the router.

A user reports that they cannot browse to a specific website on the internet. From the user's computer, a computer tech finds that a ping test to the web server succeeds. A traceroute test shows 17 hops to the destination web server. What is the MOST likely cause of the problem?

Incorrect DNS server address

You manage a network that has multiple internal subnets. You connect a workstation to the 192.168.1.0/24 subnet. This workstation can communicate with some hosts on the private network, but not with other hosts. You run ipconfig /all and see the following: Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : mydomain.local Description . . . . . . . : Broadcom network adapter Physical Address. . . . . . : 00-AA-BB-CC-74-EF DHCP Enabled . . . . . . . : No Autoconfiguration Enabled. . . : Yes IPv4 Address . . . . . . . : 192.168.1.102(Preferred) Subnet Mask. . . . . . . . : 255.255.0.0 Default Gateway . . . . . . : 192.168.1.1 DNS Servers . . . . . . . : 192.168.1.20192.168.1.27 What is the MOST likely cause of the problem?

Incorrect subnet mask

You've configured your organization's DHCP server to dynamically assign IP addresses and changed the default lease time from eight to four days. What impact, if any, will this have on the network?

Increased network traffic

Which of the following BEST describes how a switch functions?

It connects multiple cable segments (or devices) and forwards frames to the appropriate segment.

What are the small, rapid variations in a system clock called?

Jitter

Workstation3 has started communicating with Workstation2. It sends a frame to the default gateway. Identify the Layer 2 and Layer 3 addresses used by the Cisco 2600 router to forward the data to Workstation2 by dragging the corresponding address from the list on the left to its location on the right. (picture)

Layer 2 source address → 000b5f2a2222 Layer 3 source address → 192.168.11.11 Layer 2 destination address → 080046987654 Layer 3 destination address → 192.168.10.12

You're troubleshooting an IP addressing issue, and you issue a command to view the system's TCP/IP configuration. The command you use produces the following output: fxp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 inet6 fe80::2a0:83ff:fe30:57a%fxp0 prefixlen 64 scopeid 0x1 inet 192.168.1.235 netmask 0xfffffc00 broadcast 255.255.255.255 ether 00:a0:83:30:05:7a media: Ethernet autoselect (100baseTX <full-duplex>) status: active lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384 inet6 ::1 prefixlen 128 inet6 fe80::1%lo0 prefixlen 64 scopeid 0x7 inet 127.0.0.1 netmask 0xff000000 Which of the following operating systems are you working on?

Linux

Which of the following terms identifies the wiring closet in the basement or ground floor that typically includes the demarcation point?

MDF

You have a network that uses a logical ring topology. How do messages travel through the network?

Messages travel from one device to the next until they reach the destination device.

Which address type do people use to support video conference calls consisting of multiple participants?

Multicast

You want to measure the voltage, amps, and ohms of various devices. Which tool should you use?

Multimeter

You're working with an existing fiber optic installation in your building. You want to know the length of each cable that runs through the walls. Which tool should you use?

OTDR

Which of the following terminates individual wires from a 25-pair or 100-pair cable using female RJ45 ports?

Patch panel

You need to terminate a Cat6 UTP cable with an RJ45 connector. Your organization's IT policy states that all cable connectors must be wired according to TIA568B standards. Drag the UTP wire on the left to the correct pin on the RJ45 connector on the right.

Pin 1 → White with orange stripe Pin 2 → Solid orange Pin 3 → White with green stripe Pin 4 → Solid blue Pin 5 → White with blue stripe Pin 6 → Solid green Pin 7 → White with brown stripe Pin 8 → Solid brown

You're adding new wires in your building for some new offices. The building has a false ceiling that holds the lights and provides an air path for heating and air conditioning. You'd like to run your Ethernet cables in this area. Which type of cable must you use?

Plenum-rated cable

Match each layer of the TCP/IP model on the left with the corresponding layer of the OSI model on the right. Each option on the left can be used more than once.

Presentation Layer → Application Data Link Layer → Network Application Layer → Application Session Layer → Application Network Layer → Internetwork Transport Layer → Transport

CorpServ is a small company with 14 client systems and a network printer. Because there are only a limited number of network systems, you decide to use APIPA addressing. With APIPA configured, all the systems are able to communicate with each other, but you're having trouble configuring internet access. What is the MOST LIKELY cause of the problem?

Private addresses cannot directly communicate with hosts outside the local subnet.

Which term does the OSI model use that's different from the TCP/IP model in reference to the terms frame, packet, and segment?

Protocol data unit (PDU)

You have a small home network connected to the internet using an RG-6 cable. You need to move the router, but you can't find anymore RG-6 cabling. Which cable type could you use instead?

RG-59

Which of the following connectors is used with Ethernet 100BaseTX networks?

RJ45

Which of the following connector types would you most likely use to connect to a T1 WAN service?

RJ48c

What is the process of a DNS server asking other DNS servers to perform name resolution known as?

Recursive lookup

You are the network administrator for a large hospital. One of your users, Suzie, calls you stating that she is unable to access any network resources. After some initial troubleshooting, you realize that her computer is using the IP address 169.254.0.52. You've confirmed that the network's physical connection is connected properly. Which of the following should you do next?

Renew the IP address.

Which of the following topologies connects each device to a neighboring device?

Ring

Routing data between computers on a network requires several mappings between different addresses. Which of the following statements is true?

Routers use ARP to resolve known IP addresses into MAC addresses.

You have a Windows Server 2016 system that you want to use as a DHCP relay agent. Which Windows Server 2016 service would you use to do this?

Routing and Remote Access

Your company has just acquired another company in the same city. You need to integrate the two email systems so that messages can be exchanged between email servers. Currently, each network uses an email package from a different vendor. Which TCP/IP protocol enables message exchange between systems?

SMTP

What is the first thing a device does when it connects to a network?

Sends a DHCP Discover packet

You are the network administrator for a small consulting firm. You've set up an NTP server to manage the time across all the machines in the network. You have a computer that's experiencing a slight time drift of just a few seconds. Which time correction should you use to fix the system's clock?

Slew

Users report that the internet is no longer accessible. You suspect that the line connecting your building to the internet isn't working properly. Which of the following allows the service provider to remotely test the local loop?

Smartjack

Which of the following best describes the purpose of using subnets?

Subnets divide an IP network address into multiple network addresses.

You're an application developer, and you're writing a program for exchanging video files through a TCP/IP network. You need to select a transport protocol that will guarantee delivery. Which TCP/IP protocol provides this capability?

TCP

Which of the following network services or protocols uses TCP/IP port 69?

TFTP

You are the network administrator for a large hospital. One of your users, Suzie, calls you stating that she is unable to access any network resources. After some initial troubleshooting, you realize that her computer is using the IP address 169.254.0.52. You've performed the following troubleshooting steps so far: - Verified physical network connection - Attempted to renew the IP address - Discovered other devices are experiencing the same issue Which of the following is the MOST likely cause for Suzie's issue?

The DHCP server is misconfigured or down.

Which IP address do broadcast messages use?

The last valid IP address on the subnet

You are the network administrator for a consulting firm. A website that users on your network visit has a habit of frequently changing its IP address. When these IP mappings change, users are unable to connect until you clear the DNS cache. Which of the following settings should you configure so that the cache does not need to be manually cleared every time?

Time to live

During TCP/IP communication between two network hosts, information is encapsulated on the sending host and decapsulated on the receiving host using the OSI model. Match the information format on the left with the appropriate layer of the OSI model on the right.

Transport Layer → Segments Network Layer → Packets Data Link Layer → Frames Physical Layer → Bits

Which of the following time standards does NTP use?

UTC

How do switches and bridges learn where devices are located on a network?

When a frame enters a port, the source MAC address is copied from the frame header.

Why might you use an RJ11 connector?

You want to connect your computer to the internet with a DSL modem.

Which of the following tools would you use to view the MAC addresses associated with IP addresses that the local workstation has contacted recently?

arp

Which of the following is the top-level domain in www.testout.com.'s fully qualified domain name (FQDN)?

com

You've been called in to troubleshoot a connectivity problem on a newly installed Windows Server system. The system is operating well and is able to communicate with other systems on the local network. However, it's unable to access any systems on other segments of the corporate network. You suspect that the system's default gateway parameter hasn't been configured or may be configured incorrectly. Which of the following utilities are you MOST likely to use to view the system's default gateway information?

ipconfig

You are a network technician for a small consulting firm. One of your responsibilities is to manage the intranet site and configuration. You recently had to update the site's IP mapping due to a server upgrade. A user is having an issue with connecting to the intranet site now. When the user attempts to connect through their web browser, they receive a message that the page cannot be displayed. If you type in the IP address, the page loads fine. Which of the following commands should you use to fix this issue?

ipconfig /flushdns

Examine the following output: Active Connections Proto Local Address Foreign Address State TCP SERVER1:1036 localhost:4832 TIME_WAIT TCP SERVER1:4798 localhost:1032 TIME_WAIT TCP SERVER1:1258 pool-141-150-16-231.mad.east.ttr:24076 CLOSE_WAIT TCP SERVER1:2150 cpe-66-67-225-118.roc.res.rr.com:14100 ESTABLISHED TCP SERVER1:268 C872c-032.cpe.net.cale.rers.com:46360 ESTABLISHED TCP SERVER1:2995 ip68-97-96-186.ok.ok.cox.net:23135 ESTABLISHED Which of the following utilities produced this output?

netstat

Mary calls to tell you that she can't connect to an intranet server called WebSrv1. From her computer, you ping the server's IP address. The ping test is successful. Which tool would you use on her workstation next to troubleshoot the problem?

nslookup

Examine the following output: Reply from 64.78.193.84: bytes=32 time=86ms TTL=115 Reply from 64.78.193.84: bytes=32 time=43ms TTL=115 Reply from 64.78.193.84: bytes=32 time=44ms TTL=115 Reply from 64.78.193.84: bytes=32 time=47ms TTL=115 Reply from 64.78.193.84: bytes=32 time=44ms TTL=115 Reply from 64.78.193.84: bytes=32 time=44ms TTL=115 Reply from 64.78.193.84: bytes=32 time=73ms TTL=115 Reply from 64.78.193.84: bytes=32 time=46ms TTL=115 Which of the following utilities produced this output?

ping

While working on a Linux server, you're unable to connect to your Windows Server system across the internet. You're able to ping the default gateway on your own network, so you suspect that the problem lies outside of the local network. Which utility would you use to track the route a packet takes as it crosses the network?

traceroute

Which of the following commands should you use to check the route a packet takes between a workstation and the DNS server?

tracert