Which statement correctly describes the difference between IPv4 and IPv6 addressing?

IPv4 uses 32-bit addresses and IPv6 uses 128-bit addresses.

IPv4 addresses are always public and IPv6 addresses are always private.

IPv4 uses 128-bit addresses and IPv6 uses 32-bit addresses.

IPv4 addresses are written in hexadecimal and IPv6 addresses are written in dotted decimal.

A network administrator is analyzing a packet capture and sees a frame with a source MAC address of 00:1A:2B:3C:4D:5E. What does the first three octets (00:1A:2B) represent?

The VLAN ID assigned to the frame

The IP address of the sending device

The Organizationally Unique Identifier (OUI), identifying the vendor of the NIC

The host portion of the MAC address, unique to the device

A network engineer is investigating a security issue. An attacker is sending frames with a spoofed source MAC address to redirect traffic. The switch's MAC address table keeps updating to point to the attacker's port. Which mitigation is most effective?

Enable MAC address filtering on the switch

Use MACsec to encrypt and authenticate frames

Enable DHCP snooping on the switch

Configure port security to limit the number of MAC addresses per port

A network engineer is configuring a new switch and needs to ensure that frames are forwarded only to the correct port based on the destination MAC address. What is the switch's primary mechanism for this?

The routing table, which determines the next hop for IP packets

The ARP cache, which maps IP addresses to MAC addresses

The MAC address table, populated by learning source MAC addresses from incoming frames

The VLAN table, which associates ports with VLANs

A network administrator is capturing traffic on a switch port and observes a frame with a destination MAC address of 01:00:5E:00:00:01. What type of traffic is this frame most likely carrying?

Unicast traffic to a specific host

Juniper NetworksCertified Associate, Junos

Domain 1Objective 4

Layer 2 and Layer 3 Addressing JN0-105 Practice Questions (Page 4)

Part of the Networking Fundamentals domain, which makes up ~24% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~8–14 in this domain), expect 1–1 from this objective — we provide 21 practice questions to prepare you well beyond it. (estimate)

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5free pages

3concepts

Questions 16–20

16foundation · easy
Which statement correctly describes the difference between IPv4 and IPv6 addressing?
Select an answer first
17application · easy
A network administrator is analyzing a packet capture and sees a frame with a source MAC address of 00:1A:2B:3C:4D:5E. What does the first three octets (00:1A:2B) represent?
Select an answer first
18expert · hard
A network engineer is investigating a security issue. An attacker is sending frames with a spoofed source MAC address to redirect traffic. The switch's MAC address table keeps updating to point to the attacker's port. Which mitigation is most effective?
Select an answer first
19application · easy
A network engineer is configuring a new switch and needs to ensure that frames are forwarded only to the correct port based on the destination MAC address. What is the switch's primary mechanism for this?
Select an answer first
20application · medium
A network administrator is capturing traffic on a switch port and observes a frame with a destination MAC address of 01:00:5E:00:00:01. What type of traffic is this frame most likely carrying?
Select an answer first

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