Tüm alıştırma soruları

A network administrator executes a command-line query to verify how an application alias is configured in the domain zone file. The `dig` output displays the following answer section:

text
;; ANSWER SECTION:
app.example.com. 3600 IN CNAME web-server-01.example.com.

Which DNS record type is being used to map the alias hostname `app.example.com` to the canonical domain name `web-server-01.example.com`?

A client computer on an enterprise network attempts to resolve the domain name www.example.com for the first time without any local cached records. Place the steps of the DNS lookup process in the correct chronological order from the initial request to receiving the IP address.

A network administrator is configuring interface `GigabitEthernet1/0/12` on a switch to connect to a multi-tenant device. The device sends tagged frames for VLAN 200 (Data) and untagged frames for device management. The administrator needs to ensure that untagged management frames are assigned to VLAN 50 while allowing tagged VLAN 200 frames across the link. Which configuration snippet correctly satisfies these requirements?

An enterprise layer 3 switch receives an IP packet destined for $10.20.30.45$. The active routing table contains three matching entries for this destination:

- Static route to $10.20.30.0/24$ (Administrative Distance: $1$)
- OSPF route to $10.20.30.32/28$ (Administrative Distance: $110$)
- BGP route to $10.0.0.0/8$ (Administrative Distance: $20$)

Which route will the switch select to forward the packet?

A network administrator is deploying OSPF across an enterprise edge router connected to a service provider. The administrator configures a static default route ($0.0.0.0/0$) pointing toward the ISP gateway for external Internet destination handling. The internal routers within the enterprise network need to learn this default egress route automatically through the existing dynamic routing process without manually adding static routes to every downstream router. Which of the following configuration actions should the administrator perform on the edge router to fulfill this routing requirement?

A network administrator is reviewing how a link-state routing protocol like OSPF establishes network topology visibility and calculates paths. Place the operational steps of a link-state routing protocol in the correct chronological sequence, starting from initial neighbor discovery to final IP routing table entry installation.

A network engineer is dividing the enterprise IPv4 address block $10.45.0.0/21$ into equal-sized subnets using a prefix mask of $/26$. What is the total number of usable host IP addresses available across all of the newly created $/26$ subnets?

A systems engineer queries an internal name server using the `nslookup` command to verify host address resolution for a database server:

text
> nslookup db01.contoso.local
Server: dns1.contoso.local
Address: 10.0.0.2

Name: db01.contoso.local
Address: 10.0.1.50

Which DNS resource record type provides this direct mapping of a hostname to an IPv4 address?

A network administrator is categorizing dynamic routing protocols based on administrative distance and metric calculations for an enterprise baseline audit. Match each dynamic routing protocol on the left with its corresponding default administrative distance and primary metric characteristics on the right.

A network engineer is configuring access control lists on a core switch that routes traffic between an enterprise client VLAN and a server subnet hosting central network services. Endpoints on the client VLAN rely on a local DHCP relay agent embedded in their default gateway to receive IP assignments from the central DHCP server. Which of the following port and transport protocol combinations must be permitted to allow full bidirectional DHCP relay and client-server operation? (Select TWO.)

A network engineer is allocated the IPv4 block $198.51.100.0/24$ and needs to provision subnets for departmental networks. Each departmental network must support a minimum of $25$ usable host IP addresses. Using the longest prefix length (smallest subnet size) that satisfies this host requirement, what is the maximum number of usable host IP addresses available on each generated subnet?

An enterprise router receives routing updates for the identical destination network prefix (172.16.10.0/24) from two dynamic routing protocols: EIGRP and OSPF. Assuming default protocol settings and identical prefix lengths, which criterion determines which path the router places into its active IP routing table?

A network administrator is provisioning a dedicated IPv4 subnet for a store's point-of-sale terminals using the network address block $172.16.100.0/22$. Which of the following represents the first usable host IP address within this subnet?

Match each 802.1Q switch interface configuration command with its corresponding operational behavior on an enterprise switch link.

A network administrator is deploying a DHCP relay service on a Layer 3 boundary router to service workstations located on VLAN 40 ($172.28.40.0/24$). The centralized corporate DHCP server is located on a distant management network at $10.50.1.100$. Workstations on VLAN 40 are currently getting APIPA addresses ($169.254.x.x$) because broadcast DHCPDISCOVER messages are stopped at the router. Which TWO of the following requirements or configuration steps are necessary on the router to allow clients on VLAN 40 to successfully obtain leases from the central DHCP server? (Select TWO.)

A network architect is evaluating dynamic routing protocol behaviors for an enterprise network expansion. Which of the following statements accurately contrast the operational characteristics and algorithms of link-state routing protocols with distance-vector routing protocols? (Select TWO.)

A network administrator needs to assign an IPv4 subnet for a database cluster requiring static IP addresses for $110$ physical node interfaces, $2$ virtual load balancer IP addresses, and $2$ redundant default gateway interfaces. Which CIDR prefix length represents the smallest subnet mask that will accommodate all required host addresses?

A client host connected to a remote VLAN requires an IPv4 address lease from a centralized DHCP server located across a Layer 3 boundary router configured with a DHCP relay agent (ip helper-address). Arrange the packet forwarding, header modifications, and protocol processing steps of the initial DHCP lease negotiation in the correct chronological order from first to last.

An enterprise network administrator deploys a new segment of 250 internal workstations that require simultaneous outbound internet access. The edge firewall is configured with dynamic NAT using a public IP pool consisting of a single $/28$ prefix (14 usable public IPv4 addresses). During peak operational hours, only the first 14 hosts can establish outbound sessions, while all remaining workstations experience connection timeouts when reaching external web servers. Which of the following configuration modifications will resolve the connectivity issue without acquiring additional public IP addresses?

A workstation on a remote branch subnet requests an IPv4 address from a centralized DHCP server located across a routed WAN link via a local Layer 3 DHCP relay agent. Arrange the steps of the initial DHCP discovery and offer phase in the correct chronological order from start to finish.