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web.groovymark@gmail.com
- November 30, 2024
Question 21
Which feature on a switch should a project manager use to allow switches to operate as a group?
a) VLAN tagging
b) Stackable
c) LACP
d) STP
Correct Answer: b) Stackable
Explanation: Stackable switches can be grouped together to function as a single unit.
Question 22
Which tool should a network operator use to troubleshoot kinks and imperfections in network cabling?
a) OTDR
b) Cable tester
c) TDR
d) Crimper
Correct Answer: c) TDR
Explanation: A Time-Domain Reflectometer (TDR) is used to find imperfections such as kinks in cables by analyzing signal reflections.
Question 23
What protocol should be filtered to investigate a CAM table flooded by an attacker?
a) DNS
b) ARP
c) DHCP
d) ICMP
Correct Answer: b) ARP
Explanation: A CAM table flooding attack often involves ARP traffic, so filtering ARP protocol will help identify related malicious activity.
Question 24
What is the typical use of the IP range 0.0.0.0/8?
a) Multicasting
b) Loopback address
c) Reserved for documentation
d) Source address by a client seeking a DHCP lease
Correct Answer: d) Source address by a client seeking a DHCP lease
Explanation: IP range 0.0.0.0/8 is typically used by clients seeking a DHCP lease when they do not yet have an assigned IP.a) Multicasting
b) Loopback address
c) Reserved for documentation
Question 25
What does the “ipconfig” command do without any switches?
a) Displays complete TCP/IP configuration
b) Forces DHCP renewal
c) Releases the IP address
d) Displays the IP address, subnet mask, and default gateway
Correct Answer: d) Displays the IP address, subnet mask, and default gateway
Explanation: The "ipconfig" command without switches displays the IP address, subnet mask, and default gateway for all network interfaces.
Question 26
Which command forces a DHCP client to renew its IP lease?
a) ipconfig /renew
b) ipconfig /release
c) ipconfig /flushdns
d) ipconfig /registerdns
Correct Answer: a) ipconfig /renew
Explanation: The "ipconfig /renew" command forces a DHCP client to renew its IP address lease from the DHCP server.
Question 27
Which command shows the ARP cache contents in Windows?
a) netstat -a
b) ipconfig /all
c) arp -a
d) nslookup
Correct Answer: c) arp -a
Explanation: The "arp -a" command displays the ARP cache contents in Windows.
Question 28
What network issue is most likely causing a network slowdown and significant increase in bandwidth usage, as indicated by high IGMP message counters on switch ports?
a) Unicast traffic
b) Multicast transmissions
c) Broadcast traffic
d) TCP retransmissions
Correct Answer: b) Multicast transmissions
Explanation: High counts of IGMP messages indicate multicast traffic, which can increase bandwidth consumption if not managed properly.
Question 29
What is NOT part of an IPv6 unicast address?
a) Starts with 2000::
b) Starts with fe80::
c) Global scope
d) Local scope
Correct Answer: b) Starts with fe80::
Explanation: IPv6 unicast addresses that start with fe80:: are link-local addresses and are not considered global unicast addresses.
Question 30
A sysadmin troubleshooting a connectivity issue suspects a disabled IP. What is the likely cause
a) Incorrect subnet mask
b) Duplicate IPs
c) Gateway misconfiguration
d) DNS server is down
Correct Answer: b) Duplicate IPs
Explanation: Duplicate IPs often cause connectivity issues, as multiple devices attempt to use the same IP on the network.
Question 31
What IPv6 header field is responsible for quality of service?
a) Traffic Class
b) Flow Label
c) Next Header
d) Hop Limit
Correct Answer: b) Flow Label
Explanation: The Flow Label field in the IPv6 header is used to prioritize packets for quality of service (QoS) purposes.
Question 32
Which protocol should a network architect research when looking for distance vector protocols?
a) OSPF
b) RIP
c) BGP
d) IS-IS
Correct Answer: b) RIP
Explanation: RIP (Routing Information Protocol) is a distance-vector routing protocol.
Question 33
Which protocol belongs to the Exterior Gateway Protocol (EGP) class?
a) RIP
b) EIGRP
c) BGP
d) OSPF
Correct Answer: c) BGP
Explanation: BGP (Border Gateway Protocol) is an Exterior Gateway Protocol used between different autonomous systems on the Internet.
Question 34
What is the name for the side of the interface connected to a customer’s router?
a) CE
b) PE
c) FE
d) RE
Correct Answer: a) CE
Explanation: The Customer Edge (CE) router is located on the customer’s premises and connects to the Provider Edge (PE) router.
Question 35
What is the name of the calculation of the amount of loss suffered by all components along a fiber transmission path?
a) Signal degradation
b) Loss budget
c) Bandwidth measurement
d) Attenuation index
Correct Answer: b) Loss budget
Explanation: The loss budget refers to the calculation of signal loss across a fiber optic path, taking into account all components.
Question 36
Which entry is NOT found in a routing table?
a) Destination
b) Metric
c) Traffic class
d) Next hop
Correct Answer: c) Traffic class
Explanation: Routing tables do not include traffic class as a standard field. Instead, they list destination, next hop, and metric values.
Question 37
What is the representation of a default route in IPv6?
a) 0.0.0.0/0
b) ::/64
c) ::/0
d) fe80::/10
Correct Answer: c) ::/0
Explanation: In IPv6, the default route is represented as ::/0, similar to 0.0.0.0/0 in IPv4.
Question 38
Which network feature should a sysadmin investigate first when troubleshooting “ICMP Time Exceeded” error messages?
a) Packet loss
b) Routing loops
c) DNS failures
d) IP fragmentation
Correct Answer: b) Routing loops
Explanation: ICMP Time Exceeded messages often indicate the presence of routing loops, where packets circle between routers.
Question 39
What should be set up to protect network administrators’ remote access?
a) Authentication
b) Encryption
c) Authorization
d) Access Control Lists (ACLs)
Correct Answer: a) Authentication
Explanation: Authentication is essential to ensure only authorized users can remotely access the network and its devices.
Question 40
What command should a technician use to create a new IP configuration for an Ethernet adapter using PowerShell?
a) New-NetIPAddress
b) Set-NetAdapter
c) Add-NetRoute
d) Enable-IPv6
Correct Answer: a) New-NetIPAddress
Explanation: The PowerShell cmdlet "New-NetIPAddress" is used to configure a new IP address for an Ethernet adapter.
