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IT0013 - F3 & F4
Networking 1 - Formative 3 and 4
| Question | Answer |
|---|---|
| What is a characteristic of UTP cabling? | ✅ cancellation |
| Which standards organization oversees development of wireless LAN standards? | ✅ IEEE |
| Which type of UTP cable is used to connect a PC to a switch port? | ✅ straight-through |
| What are two possible causes of wireless LAN signal distortion? (Choose two.) | ✅ the microwave oven; the cellular phones that are used by the employees |
| What is the definition of bandwidth? | ✅ the amount of data that can flow from one place to another in a given amount of time |
| Why are two strands of fiber used for a single fiber optic connection? | ✅ They allow for full-duplex connectivity. |
| What is indicated by the term throughput? | ✅ the measure of the usable data transferred across the media |
| In which OSI layer is a distorted NIC signal error categorized? | ✅ physical layer |
| Which procedure is used to reduce the effect of crosstalk in copper cables? | ✅ twisting opposing circuit wire pairs together |
| Which characteristic describes crosstalk? | ✅ the distortion of the transmitted messages from signals carried in adjacent wires |
| What is the hexadecimal equivalent of decimal 44? | ✅ 2C |
| What is the decimal equivalent of hexadecimal A2? | ✅ 162 |
| What is the hexadecimal equivalent of decimal 63? | ✅ 3F |
| What is the hexadecimal equivalent of decimal 71? | ✅ 47 |
| What is the decimal equivalent of hexadecimal AF? | ✅ 175 |
| What is the hexadecimal equivalent of decimal 61? | ✅ 3D |
| What is the decimal equivalent of hexadecimal A3? | ✅ 163 |
| What is the decimal equivalent of hexadecimal AD? | ✅ 173 |
| What is the hexadecimal equivalent of decimal 52? | ✅ 34 |
| What is the hexadecimal equivalent of decimal 42? | ✅ 2A |
| What method is used to manage contention-based access on a wireless network? | ✅ CSMA/CA |
| Why is CSMA/CD no longer necessary in modern Ethernet networks? | ✅ the use of full-duplex capable Layer 2 switches |
| Which OSI layer specifies the encapsulation method for specific media types? | ✅ data link |
| Which is a function of the Logical Link Control (LLC) sublayer? | ✅ to identify which network layer protocol is being used |
| Which two organizations define open standards for the data link layer? | ✅ International Telecommunication Union (ITU); International Organization for Standardization (ISO) |
| Which MAC method does Ethernet use? | ✅ CSMA/CD |
| What NIC attribute places it at the data link layer? | ✅ MAC address |
| What identifier uniquely identifies an Ethernet device at the data link layer? | ✅ MAC address |
| Which two services are performed by the data link layer? | ✅ It accepts Layer 3 packets and encapsulates them into frames; It provides media access control and performs error detection |
| What is true concerning physical and logical topologies? | ✅ Logical topologies refer to how a network transfers data between devices |
| Which statement is true about MAC addresses? | ✅ The first three bytes are used by the vendor assigned OUI. |
| Which two functions are performed by the MAC sublayer? | ✅ It is responsible for Media Access Control; It adds a header and trailer to form an OSI Layer 2 PDU |
| What is a characteristic of MAC addresses? | ✅ They must be globally unique. |
| What happens to runt frames received by a Cisco switch? | ✅ The frame is dropped. |
| What is the special value assigned to the first 24 bits of a multicast MAC address? | ✅ 01-00-5E |
| Which function is performed by the LLC sublayer? | ✅ It communicates with upper protocol layers. |
| Which two characteristics describe Ethernet technology? | ✅ It is supported by IEEE 802.3 standards; It uses the CSMA/CD access control method |
| What does a host do with a frame whose destination MAC does not match? | ✅ It will discard the frame. |
| Which device sends data based on a MAC address table? | ✅ switch |
| What type of address is 01-00-5E-0A-00-02? | ✅ an address that reaches a specific group of hosts |
| What was the reason for the creation and implementation of IPv6? | ✅ to relieve IPv4 address depletion |
| Which command can be used on a Windows host to display the routing table? | ✅ netstat -r |
| Which field in an IPv4 packet header will typically stay the same during its transmission? | ✅ Destination Address |
| A router receives a packet from the Gigabit 0/0 interface and determines that the packet needs to be forwarded out the Gigabit 0/1 interface. What will the router do next? | ✅ create a new Layer 2 Ethernet frame to be sent to the destination |
| Which IPv4 address can a host use to ping the loopback interface? | ✅ 127.0.0.1 |
| Which statement accurately describes a characteristic of IPv4? | ✅ IPv4 has a 32-bit address space |
| When a router receives a packet, what information must be examined in order for the packet to be forwarded to a remote destination? | ✅ destination IP address |
| Which information is used by routers to forward a data packet toward its destination? | ✅ destination IP address |
| What information is added during encapsulation at OSI Layer 3? | ✅ source and destination IP address |
| How does the network layer use the MTU value? | ✅ The network layer depends on the data link layer to set the MTU, and adjusts the speed of transmission to accommodate it |
| How does the ARP process use an IP address? | ✅ to determine the MAC address of a device on the same network |
| A cybersecurity analyst believes an attacker is spoofing the MAC address of the default gateway. Which command should be used? | ✅ arp -a |
| What will a Layer 2 switch do when the destination MAC address is not in the MAC table? | ✅ It forwards the frame out of all ports except for the port at which the frame was received |
| What is the purpose of ARP in an IPv4 network? | ✅ to obtain a specific MAC address when an IP address is known |
| Which two ICMPv6 messages are used during Ethernet MAC address resolution? | ✅ neighbor solicitation and neighbor advertisement |
| The ARP table in a switch maps which two types of address together? | ✅ Layer 3 address to a Layer 2 address |
| What addresses are mapped by ARP? | ✅ destination MAC address to a destination IPv4 address |
| Which destination address is used in an ARP request frame? | ✅ FFFF.FFFF.FFFF |
| What is one function of the ARP protocol? | ✅ resolving an IPv4 address to a MAC address |
| What type of information is contained in an ARP table? | ✅ IP address to MAC address mappings |
| Which router command provides the highest security for privileged EXEC access? | ✅ enable secret trustknow1 |
| What is the purpose of the startup configuration file on a Cisco router? | ✅ to contain the commands that are used to initially configure a router on startup |
| Which statement regarding service password-encryption is true? | ✅ All existing plain-text passwords are encrypted when the command is entered |
| Which set of commands allows out-of-band management access using password cisco? | ✅ line vty 0 4 / password cisco / login |
| Which command displays all interfaces with IP addresses and status? | ✅ show ip interface brief |
| Which command encrypts all passwords in a router configuration file? | ✅ service password-encryption |
| Which configuration mode allows use of the login command? | ✅ any line configuration mode |
| Which CLI mode allows access to all device commands? | ✅ privileged EXEC mode |
| Why does a router enter setup mode on boot? | ✅ The configuration file is missing from NVRAM |
| What is the purpose of the banner motd command? | ✅ It provides a way to make announcements to those who log in to a router |
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