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| Question | Answer |
|---|---|
| What will a host on an Ethernet network do if it receives a frame with a unicast destination MAC address that does not match its own MAC address? | It will discard the frame. |
| What is auto-MDIX? a type of Cisco switch an Ethernet connector type a type of port on a Cisco switch a feature that detects Ethernet cable type | a feature that detects Ethernet cable type |
| Which two functions or operations are performed by the MAC sublayer? (Choose two.) | It is responsible for Media Access Control. It adds a header and trailer to form an OSI Layer 2 PDU. |
| What type of address is 01-00-5E-0A-00-02? an address that reaches every host inside a local subnet an address that reaches one specific host an address that reaches every host in the network an address that reaches a specific group of hosts | an address that reaches a specific group of hosts |
| What happens to runt frames received by a Cisco Ethernet switch? The frame is dropped. The frame is returned to the originating network device. The frame is broadcast to all other devices on the same network | The frame is dropped. |
| What are the two sizes (minimum and expected maximum) of an Ethernet frame? (Choose two.) 56 bytes 64 bytes 128 bytes 1024 bytes 1518 bytes | 64 bytes 1518 bytes |
| What addressing information is recorded by a switch to build its MAC address table? the source Layer 3 address of outgoing packets the source Layer 2 address of incoming frames | the source Layer 2 address of incoming frames |
| Which two characteristics describe Ethernet technology? (Choose two.) | It is supported by IEEE 802.3 standards. It uses unique MAC addresses to ensure that data is sent to the appropriate destination. |
| What statement describes a characteristic of MAC addresses? They must be globally unique. They are only routable within the private network. They are added as part of a Layer 3 PDU. They have a 32-bit binary value. | They must be globally unique. |
| What is the special value assigned to the first 24 bits of a multicast MAC address transporting an IPv4 packet? 01-5E-00 FF-00-5E FF-FF-FF 01-00-5E | 01-00-5E |
| Which network device makes forwarding decisions based on the destination MAC address that is contained in the frame? repeater hub switch router | switch |
| Which network device has the primary function to send data to a specific destination based on the information found in the MAC address table? | switch |
| Which function or operation is performed by the LLC sublayer? It performs data encapsulation. It communicates with upper protocol layers. It is responsible for media access control. | It communicates with upper protocol layers. |
| Which statement is true about MAC addresses? MAC addresses are implemented by software. A NIC only needs a MAC address if connected to a WAN. The first three bytes are used by the vendor assigned OUI. | The first three bytes are used by the vendor assigned OUI. |
| Which command can be used on a Windows host to display the routing table? netstat -s show ip route netstat -r tracert | netstat -r |
| What information is added during encapsulation at OSI Layer 3? source and destination MAC source and destination application protocol source and destination port number source and destination IP address | source and destination IP address |
| How does the network layer use the MTU value? The network layer depends on the higher level layers to determine the MTU. The MTU is passed to the network layer by the data link layer. | The MTU is passed to the network layer by the data link layer. |
| Which characteristic describes an IPv6 enhancement over IPv4? | The IPv6 header is simpler than the IPv4 header is, which improves packet handling. |
| When a connectionless protocol is in use at a lower layer of the OSI model, how is missing data detected and retransmitted if necessary? | Upper-layer connection-oriented protocols keep track of the data received and can request retransmission from the upper-level protocols on the sending host. |
| What was the reason for the creation and implementation of IPv6? to make reading a 32-bit address easier to relieve IPv4 address depletion to provide more address space in the Internet Names Registry to allow NAT support for private addressing | to relieve IPv4 address depletion |
| Which statement accurately describes a characteristic of IPv4? All IPv4 addresses are assignable to hosts. IPv4 has a 32-bit address space. An IPv4 header has fewer fields than an IPv6 header has. IPv4 natively supports IPsec. | IPv4 has a 32-bit address space. |
| Which field in an IPv4 packet header will typically stay the same during its transmission? Flag Time-to-Live Packet Length Destination Address | Destination Address |
| When a router receives a packet, what information must be examined in order for the packet to be forwarded to a remote destination? destination MAC address source IP address destination IP address source MAC address | destination IP address |
| Which field in an IPv6 packet is used by the router to determine if a packet has expired and should be dropped? TTL Hop Limit Address Unreachable No Route to Destination | Hop Limit |
| Which information is used by routers to forward a data packet toward its destination? source IP address destination IP address source data-link address destination data-link address | destination IP address |
| A computer has to send a packet to a destination host in the same LAN. How will the packet be sent? | The packet will be sent directly to the destination host. |
| 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? 126.0.0.1 127.0.0.0 126.0.0.0 127.0.0.1 | 127.0.0.1 |
| Which destination address is used in an ARP request frame? 0.0.0.0 255.255.255.255 FFFF.FFFF.FFFF 127.0.0.1 01-00-5E-00-AA-23 | FFFF.FFFF.FFFF |
| What addresses are mapped by ARP? IPv4 address to a destination MAC address destination IPv4 address to the source MAC address destination IPv4 address to the destination host name destination MAC address to the source IPv4 address | IPv4 address to a destination MAC address |
| What will a Layer 2 switch do when the destination MAC address of a received frame is not in the MAC table? | It forwards the frame out of all ports except for the port at which the frame was received. |
| Which two ICMPv6 messages are used during the Ethernet MAC address resolution process? (Choose two.) | neighbor solicitation neighbor advertisement |
| Which router component holds the routing table, ARP cache, and running configuration file? RAM Flash NVRAM ROM | RAM |
| What type of information is contained in an ARP table? switch ports associated with destination MAC addresses domain name to IP address mappings routes to reach destination networks IPv4 address to MAC address mappings | IPv4 address to MAC address mappings |
| A PC is configured to obtain an IPv4 address automatically from network 192.168.1.0/24. The network administrator issues the arp -a command and notices an entry of 192.168.1.255 ff-ff-ff-ff-ff-ff. Which statement describes this entry? | This is a static map entry. |
| A cybersecurity analyst believes an attacker is spoofing the MAC address of the default gateway to perform a man-in-the-middle attack. Which command should the analyst use to view the MAC address a host is using to reach the default gateway? | arp -a |
| What is a function of ARP? resolving MAC addresses to IPv4 addresses resolving port addresses to MAC addresses resolving MAC addresses to port addresses resolving IPv4 addresses to MAC addresses | resolving IPv4 addresses to MAC addresses |
| What is the purpose of ARP in an IPv4 network? to forward data onward based on the destination IP address to obtain a specific MAC address when an IP address is known to forward data onward based on the destination MAC address. | to obtain a specific MAC address when an IP address is known |
| Which action is taken by a Layer 2 switch when it receives a Layer 2 broadcast frame? It drops the frame. It sends the frame to all ports except the port on which it received the frame. It sends the frame to all ports. | It sends the frame to all ports except the port on which it received the frame. |
| When an IPv4 packet is sent to a host on a remote network, what information is provided by ARP? | the MAC address of the router interface closest to the sending host |
| How does the ARP process use an IPv4 address? | to determine the MAC address of a device on the same network |
| The ARP table in a switch maps which two types of address together? Layer 3 address to a Layer 2 address Layer 3 address to a Layer 4 address Layer 4 address to a Layer 2 address Layer 2 address to a Layer 4 address | Layer 3 address to a Layer 2 address |
| What is one function of the ARP protocol? obtaining an IPv4 address automatically mapping a domain name to its IP address resolving an IPv4 address to a MAC address | resolving an IPv4 address to a MAC address |
| What is the purpose of the banner motd command? | It provides a way to make announcements to those who log in to a router. |
| A technician is configuring a router to allow for all forms of management access. As part of each different type of access, the technician is trying to type the command login. Which configuration mode should be entered to do this task? | any line configuration mode |
| What is stored in the NVRAM of a Cisco router? | the startup configuration |
| Which statement regarding the service password-encryption command is true? | As soon as the service password-encryption command is entered, all currently set passwords formerly displayed in plain text are encrypted. |
| An administrator is configuring a new router to permit out-of-band management access. Which set of commands will allow the required login using a password of cisco? | Router(config)# line console 0 Router(config-line)# password cisco Router(config-line)# login |
| Which command can be used on a Cisco router to display all interfaces, the IPv4 address assigned, and the current status? show ip interface brief ping show ip route show interface fa0/1 | show ip interface brief |
| Which CLI mode allows users to access all device commands, such as those used for configuration, management, and troubleshooting? user EXEC mode privileged EXEC mode global configuration mode | privileged EXEC mode |
| 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 characteristic describes the default gateway of a host computer? | the logical address of the router interface on the same network as the host computer |
| A router boots and enters setup mode. What is the reason for this? | The configuration file is missing from NVRAM. |
| Which command is used to encrypt all passwords in a router configuration file? Router_A (config) # enable secret Router_A (config) # service password-encryption Router_A (config) # enable password Router_A (config) # encrypt password | Router_A (config) # service password-encryption |
| Company policy requires using the most secure method to safeguard access to the privileged exec and configuration mode on the routers. The privileged exec password is trustknow1. Which of the following router commands achieves the goal of provid- | enable secret trustknow1 |
| What will be the response from the router after the command, “router(config)# hostname portsmouth” is entered? | portsmouth(config)# |
| What are the two sizes (minimum and maximum) of an Ethernet frame? (Choose two.) Group of answer choices 56 bytes 64 bytes 128 bytes 1518 bytes | 1518 bytes (and 64 bytes) |
| How does the ARP process use an IP address? Group of answer choices to determine the MAC address of the remote destination host to determine the MAC address of a device on the same network | to determine the MAC address of a device on the same network |
| A PC is configured to obtain an IP address automatically from network 192.168.1.0/24. The network administrator issues the arp -a command and notices an entry of 192.168.1.255 ff-ff-ff-ff-ff-ff. Which statement describes this entry? | This is a static map entry. |
| What will a host on an Ethernet network do if it receives a frame with a destination MAC address that does not match its own MAC address? | It will discard the frame. |
| What is the special value assigned to the first 24 bits of a multicast MAC address? Group of answer choices 01-5E-00 FF-00-5E FF-FF-FF 01-00-5E | 01-00-5E |
| When an IP packet is sent to a host on a remote network, what information is provided by ARP? | the MAC address of the router interface closest to the sending host |
| Which two characteristics describe Ethernet technology? (Choose two.) | It is supported by IEEE 802.3 standards., It uses the CSMA/CD access control method. |
| What type of information is contained in an ARP table? Group of answer choices switch ports associated with destination MAC addresses domain name to IP address mappings routes to reach destination networks IP address to MAC address mappings | IP address to MAC address mappings |
| The privileged exec password is trustknow1. Which of the following router commands achieves the goal of providing the highest level of security? | enable secret trustknow1 |
| What addresses are mapped by ARP? Group of answer choices destination MAC address to a destination IPv4 address destination IPv4 address to the source MAC address destination IPv4 address to the destination host name |
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powerupzzz