diff --git a/frontend/src/components/NetworkGraph.map-lookup.test.ts b/frontend/src/components/NetworkGraph.map-lookup.test.ts
index 3ba76c75c..71f718a31 100644
--- a/frontend/src/components/NetworkGraph.map-lookup.test.ts
+++ b/frontend/src/components/NetworkGraph.map-lookup.test.ts
@@ -18,7 +18,7 @@ function sourceBetween(startMarker: string, endMarker: string): string {
   return networkGraphSource.slice(startIndex, endIndex);
 }
 
-describe("NetworkGraph constant-time selection lookup contract", () => {
+describe("NetworkGraph indexed lookup architecture", () => {
   it("keeps graph event selection on memoized maps without linear fallback scans", () => {
     const edgeSelection = sourceBetween("const selectEdge =", "const selectNode =");
     const nodeSelection = sourceBetween("const selectNode =", "const handleEdgeSelection =");
diff --git a/frontend/src/components/NetworkGraph.option-limits.test.tsx b/frontend/src/components/NetworkGraph.option-limits.test.tsx
new file mode 100644
index 000000000..e69a4089c
--- /dev/null
+++ b/frontend/src/components/NetworkGraph.option-limits.test.tsx
@@ -0,0 +1,129 @@
+/* @vitest-environment jsdom */
+import React, { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, describe, expect, it, vi } from "vitest";
+
+const destroyMock = vi.fn();
+
+vi.mock("vis-network", () => ({
+  Network: vi.fn(function MockNetwork() {
+    return {
+      destroy: destroyMock,
+      fit: vi.fn(),
+      moveTo: vi.fn(),
+      off: vi.fn(),
+      on: vi.fn(),
+      selectEdges: vi.fn(),
+      selectNodes: vi.fn(),
+    };
+  }),
+}));
+
+import NetworkGraph from "./NetworkGraph";
+
+function jsonResponse(body: unknown) {
+  return {
+    ok: true,
+    json: async () => body,
+  };
+}
+
+async function flushAsyncWork() {
+  for (let index = 0; index < 5; index += 1) {
+    await act(async () => {
+      await Promise.resolve();
+      await new Promise((resolve) => setTimeout(resolve, 0));
+    });
+  }
+}
+
+describe("NetworkGraph display limits", () => {
+  let root: Root | null = null;
+  let container: HTMLDivElement | null = null;
+
+  afterEach(() => {
+    if (root) {
+      act(() => root?.unmount());
+    }
+    root = null;
+    container?.remove();
+    container = null;
+    vi.unstubAllGlobals();
+    vi.clearAllMocks();
+  });
+
+  it("renders bounded options while preserving the first five non-empty node labels", async () => {
+    const nodes = [
+      { id: "blank-1", label: "" },
+      { id: "node-1", label: "노드 1" },
+      { id: "blank-2", label: "" },
+      { id: "node-2", label: "노드 2" },
+      { id: "node-3", label: "노드 3" },
+      { id: "node-4", label: "노드 4" },
+      { id: "node-5", label: "노드 5" },
+      { id: "node-6", label: "노드 6" },
+      { id: "node-7", label: "노드 7" },
+      { id: "node-8", label: "노드 8" },
+    ];
+    const edges = Array.from({ length: 7 }, (_, index) => ({
+      id: `edge-${index + 1}`,
+      from: "node-1",
+      to: "node-2",
+      title: `관계 ${index + 1}`,
+    }));
+    vi.stubGlobal(
+      "fetch",
+      vi.fn(() => Promise.resolve(jsonResponse({ nodes, edges }))),
+    );
+
+    container = document.createElement("div");
+    document.body.appendChild(container);
+    root = createRoot(container);
+
+    await act(async () => {
+      root?.render(<NetworkGraph />);
+    });
+    await flushAsyncWork();
+
+    const relationshipSelect = container.querySelector<HTMLSelectElement>(
+      'select[aria-label="관계 선택"]',
+    );
+    const nodeSelect = container.querySelector<HTMLSelectElement>(
+      'select[aria-label="노드 선택"]',
+    );
+    const relationshipValues = Array.from(relationshipSelect?.options ?? []).map(
+      (option) => option.value,
+    );
+    const nodeValues = Array.from(nodeSelect?.options ?? []).map(
+      (option) => option.value,
+    );
+
+    expect(relationshipValues).toEqual([
+      "",
+      "edge-1",
+      "edge-2",
+      "edge-3",
+      "edge-4",
+      "edge-5",
+    ]);
+    expect(nodeValues).toEqual([
+      "",
+      "blank-1",
+      "node-1",
+      "blank-2",
+      "node-2",
+      "node-3",
+      "node-4",
+      "node-5",
+      "node-6",
+    ]);
+
+    const summary = Array.from(container.querySelectorAll("p")).find((element) =>
+      element.textContent?.includes("관련 노드:"),
+    );
+    expect(summary?.textContent).toContain(
+      "관련 노드: 노드 1, 노드 2, 노드 3, 노드 4, 노드 5",
+    );
+    expect(summary?.textContent).not.toContain("노드 6");
+  });
+});
diff --git a/frontend/src/components/NetworkGraph.tsx b/frontend/src/components/NetworkGraph.tsx
index f9eb61c71..77bafeb3c 100644
--- a/frontend/src/components/NetworkGraph.tsx
+++ b/frontend/src/components/NetworkGraph.tsx
@@ -278,27 +278,44 @@ export default function NetworkGraph() {
   }, [nodes, edges, nodeMap, edgeMap]);
 
   const nodeLabels = useMemo(() => {
-    return nodes
-      .map((node) => String(node.label ?? node.id))
-      .filter(Boolean)
-      .slice(0, 5);
+    const labels = [];
+    for (const node of nodes) {
+      if (labels.length >= 5) break;
+      const label = String(node.label ?? node.id);
+      if (label) labels.push(label);
+    }
+    return labels;
   }, [nodes]);
 
   const firstEdge = edges[0] ?? null;
   const relationshipOptions = useMemo(() => {
-    return Array.from(edgeMap.values()).slice(0, 5).map((edge, index) => ({
-      edge,
-      id: String(edge.id),
-      label: `관계 ${index + 1}: ${describeEdge(edge, nodeMap)}`,
-    }));
+    const options = [];
+    let index = 0;
+    for (const edge of edgeMap.values()) {
+      if (index >= 5) break;
+      options.push({
+        edge,
+        id: String(edge.id),
+        label: `관계 ${index + 1}: ${describeEdge(edge, nodeMap)}`,
+      });
+      index++;
+    }
+    return options;
   }, [edgeMap, nodeMap]);
 
   const nodeOptions = useMemo(() => {
-    return Array.from(nodeInstanceMap.values()).slice(0, 8).map((node) => ({
-      id: String(node.id),
-      label: `노드: ${String(node.label ?? node.id)}`,
-      node,
-    }));
+    const options = [];
+    let count = 0;
+    for (const node of nodeInstanceMap.values()) {
+      if (count >= 8) break;
+      options.push({
+        id: String(node.id),
+        label: `노드: ${String(node.label ?? node.id)}`,
+        node,
+      });
+      count++;
+    }
+    return options;
   }, [nodeInstanceMap]);
 
   const selectRelationship = (edge: Edge, status: string) => {
diff --git a/requirements-strix-ci-hashes.txt b/requirements-strix-ci-hashes.txt
index eaa2ad04f..268d89992 100644
--- a/requirements-strix-ci-hashes.txt
+++ b/requirements-strix-ci-hashes.txt
@@ -142,6 +142,7 @@ anyio==4.14.2 \
     #   google-genai
     #   gql
     #   httpx
+    #   httpx2
     #   mcp
     #   openai
     #   sse-starlette
@@ -849,6 +850,7 @@ h11==0.16.0 \
     --hash=sha256:63cf8bbe7522de3bf65932fda1d9c2772064ffb3dae62d55932da54b31cb6c86
     # via
     #   httpcore
+    #   httpcore2
     #   uvicorn
 hf-xet==1.5.1 \
     --hash=sha256:0c97106032ef70467b4f6bc2d0ccc266d7613ee076afc56516c502f87ce1c4a6 \
@@ -881,6 +883,10 @@ httpcore==1.0.9 \
     --hash=sha256:2d400746a40668fc9dec9810239072b40b4484b640a8c38fd654a024c7a1bf55 \
     --hash=sha256:6e34463af53fd2ab5d807f399a9b45ea31c3dfa2276f15a2c3f00afff6e176e8
     # via httpx
+httpcore2==2.12.0 \
+    --hash=sha256:7e04258ce01013d7d615e5b910a3b27fac937d7a95038227e79652b4ba3b4ceb \
+    --hash=sha256:9293522bba0aa7c4c8e9e3f040c16575bd8868e155a77fa30c7a9085a5eae648
+    # via httpx2
 httpx==0.28.1 \
     --hash=sha256:75e98c5f16b0f35b567856f597f06ff2270a374470a5c2392242528e3e3e42fc \
     --hash=sha256:d909fcccc110f8c7faf814ca82a9a4d816bc5a6dbfea25d6591d6985b8ba59ad
@@ -894,6 +900,10 @@ httpx-sse==0.4.3 \
     --hash=sha256:0ac1c9fe3c0afad2e0ebb25a934a59f4c7823b60792691f779fad2c5568830fc \
     --hash=sha256:9b1ed0127459a66014aec3c56bebd93da3c1bc8bb6618c8082039a44889a755d
     # via mcp
+httpx2==2.12.0 \
+    --hash=sha256:7631fe9887a8a2275f4a2540e053aa670fcc50742864a9ae7c66e609fdcf12cf \
+    --hash=sha256:cc8b6eecb8661c146b8f89a60e97456ee086e91a784ed31ac450c3a9e613dd36
+    # via -r requirements-strix-ci.txt
 huggingface-hub==1.23.0 \
     --hash=sha256:b1d604788f5adc7f0eb246e03e0ec19011ca06e38400218c347dccc3dffa64a2 \
     --hash=sha256:c04997fb8bbdace1e57b7703d30ed7678af51f70d00d241819ff411b92ae9a88
@@ -904,6 +914,7 @@ idna==3.18 \
     # via
     #   anyio
     #   httpx
+    #   httpx2
     #   requests
     #   yarl
 importlib-metadata==8.9.0 \
@@ -2103,6 +2114,12 @@ tqdm==4.68.4 \
     # via
     #   huggingface-hub
     #   openai
+truststore==0.10.4 \
+    --hash=sha256:9d91bd436463ad5e4ee4aba766628dd6cd7010cf3e2461756b3303710eebc301 \
+    --hash=sha256:adaeaecf1cbb5f4de3b1959b42d41f6fab57b2b1666adb59e89cb0b53361d981
+    # via
+    #   httpcore2
+    #   httpx2
 types-requests==2.33.0.20260712 \
     --hash=sha256:2141b67ab534a5c5cd2dac5034f2a35f42e699c5bf185eee608c5246a069d7fb \
     --hash=sha256:de027e28c171d3da529689cbfa023b0b4eab188c8dfa22fd834eebd2cee6e7bb
diff --git a/requirements-strix-ci.txt b/requirements-strix-ci.txt
index a1faaf6a4..58506695d 100644
--- a/requirements-strix-ci.txt
+++ b/requirements-strix-ci.txt
@@ -3,3 +3,4 @@ google-cloud-aiplatform==1.160.0
 cryptography==50.0.0
 protobuf==6.33.6
 python-multipart==0.0.32
+httpx2