D412 Network Analytics and Troubleshooting - Set 1 - Part 1

Correct Answer: UDP 67, UDP 68

DHCP uses the UDP protocol and operates on ports 67 (server) and 68 (client).

Correct Answer: UDP 53

DNS uses UDP on port 53 for standard queries, though TCP can also be used for larger transfers like zone transfers.

Correct Answer: SMTP TCP 25, POP3 TCP 110, IMAP4 TCP 143

SMTP, POP3, and IMAP4 are the standard protocols used for sending and receiving email, and they operate on TCP ports 25, 110, and 143, respectively.

Correct Answer: TCP 389, TCP 636

LDAP uses port 389 for unencrypted communication and port 636 for encrypted communication.

Correct Answer: TCP 5060, TCP 5061

SIP uses ports 5060 (unencrypted) and 5061 (encrypted) for VoIP and multimedia sessions.

Correct Answer: TCP, UDP, IP, ICMP

The four core protocols of the TCP/IP suite are TCP, UDP, IP, and ICMP, which provide essential communication and error-handling services.

Correct Answer: Application, Presentation, Session, Transport, Network, Data Link, Physical

The OSI model is structured from the Application layer (top) down to the Physical layer (bottom).

Correct Answer: CSMA/CD

CSMA/CD (Carrier Sense Multiple Access with Collision Detection) is used in wired Ethernet networks where hubs control the medium.

Correct Answer: Switch port

A switch port defines the boundary of a collision domain because switches operate at Layer 2 and segment collision domains.

Correct Answer: Router

Routers separate broadcast domains by not forwarding broadcast traffic between different networks.

Correct Answer: MAC table

A MAC table contains entries that map MAC addresses to physical port numbers on a switch.

Correct Answer: OSPF

OSPF (Open Shortest Path First) is a link-state routing protocol used to calculate the shortest path for network traffic.

Correct Answer: EIGRP

EIGRP (Enhanced Interior Gateway Routing Protocol) is a hybrid protocol that combines the features of both distance vector and link-state protocols.

Correct Answer: BGP

BGP (Border Gateway Protocol) is an exterior gateway protocol used to exchange routing information between different autonomous systems.

Correct Answer: Router advertisement

In IPv6, routers send Router Advertisement messages to inform clients about the network prefix and other configuration details.

Correct Answer: Diffserv

Diffserv (Differentiated Services) embeds traffic priority information into the IP header to manage quality of service.

Correct Answer: 802.1q

IEEE 802.1q is the standard for VLAN tagging, used for VLAN trunking across network devices.

Correct Answer: Class D, Class E

Class D (multicast) and Class E (experimental) addresses do not require subnet masks.

Correct Answer: Ring

In a ring topology, each node is a repeater, forwarding data to the next node in the ring.

Correct Answer: Mesh

Ad-hoc wireless networks typically use a mesh topology, where each device can communicate directly with others.